test: migrate examples to XXXX-category-name layout + split expected streams

Rename all example tests/companions to the XXXX-category-test-name scheme
(per-category 100-blocks: basic 0010, types 0100, ... errors 1000,
diagnostics 1100, ffi 1200, ffi-objc 1300, ffi-jni 1400, vectors 1500,
platform 1600). Companions and dir/C fixtures move in lockstep with their
parent test; #import/#source/#include paths rewritten to match.

Expected output now lives in examples/expected/ (a sibling dir of the
tests) split into three streams per the new convention:
  <name>.exit / <name>.stdout / <name>.stderr  (+ optional <name>.ir)

run_examples.sh rewritten: scans examples/ and issues/ for an
expected/<name>.exit marker, captures stdout and stderr separately (no
more 2>&1), compares each stream + exit + optional IR snapshot.

Behavior validated unchanged: every renamed test reproduces its prior
merged output + exit (diffs limited to file paths/basenames embedded in
diagnostics + traces, which correctly reflect the new names). Suite:
292 passed, 0 failed. 50-smoke.sx split + issue relocation + docs follow
in subsequent commits.

examples/expected/0010-basic-basic.exit

@@ -0,0 +1 @@
+42

examples/expected/0010-basic-basic.stderr

@@ -0,0 +1 @@
+

examples/expected/0010-basic-basic.stdout

@@ -0,0 +1 @@
+

examples/expected/0011-basic-stdout.exit

@@ -0,0 +1 @@
+0

examples/expected/0011-basic-stdout.stderr

@@ -0,0 +1 @@
+

examples/expected/0011-basic-stdout.stdout

@@ -0,0 +1 @@
+Hello

examples/expected/0012-basic-shadow.exit

@@ -0,0 +1 @@
+0

examples/expected/0012-basic-shadow.stderr

@@ -0,0 +1 @@
+

examples/expected/0012-basic-shadow.stdout

@@ -0,0 +1,4 @@
+scope opened
+scoped x: 6
+scope closed
+main x: 42

examples/expected/0013-basic-defer.exit

@@ -0,0 +1 @@
+42

examples/expected/0013-basic-defer.stderr

@@ -0,0 +1 @@
+

examples/expected/0013-basic-defer.stdout

@@ -0,0 +1 @@
+still here

examples/expected/0014-basic-code.exit

@@ -0,0 +1 @@
+0

examples/expected/0014-basic-code.stderr

@@ -0,0 +1 @@
+

examples/expected/0014-basic-code.stdout

@@ -0,0 +1 @@
+hello from the other side

examples/expected/0015-basic-demo.exit

@@ -0,0 +1 @@
+0

examples/expected/0015-basic-demo.stderr

@@ -0,0 +1 @@
+

examples/expected/0015-basic-demo.stdout

@@ -0,0 +1 @@
+[1.000000, 0.000000, -1.000000]

examples/expected/0016-basic-while.exit

@@ -0,0 +1 @@
+0

examples/expected/0016-basic-while.stderr

@@ -0,0 +1 @@
+

examples/expected/0016-basic-while.stdout

@@ -0,0 +1,4 @@
+count: 5
+break at: 12
+sum of odd 1-9: 25
+sum 55

examples/expected/0017-basic-conditions.exit

@@ -0,0 +1 @@
+0

examples/expected/0017-basic-conditions.stderr

@@ -0,0 +1 @@
+

examples/expected/0017-basic-conditions.stdout

@@ -0,0 +1 @@
+containedcontainedcontained

examples/expected/0018-basic-quicksort.exit

@@ -0,0 +1 @@
+0

examples/expected/0018-basic-quicksort.stderr

@@ -0,0 +1 @@
+

examples/expected/0018-basic-quicksort.stdout

@@ -0,0 +1 @@
+[1, 2, 2, 2, 3, 3, 4, 5, 5, 6, 6, 333]

examples/expected/0019-basic-dot-shorthand.exit

@@ -0,0 +1 @@
+0

examples/expected/0019-basic-dot-shorthand.stderr

@@ -0,0 +1 @@
+

examples/expected/0019-basic-dot-shorthand.stdout

@@ -0,0 +1,41 @@
+--- tagged enum compat ---
+T1: 3.140000
+T2: 3
+T3: 5.000000 3.000000
+T4: 2.710000
+T5: 9.500000
+T6: 4.199999
+T7a: 1.000000
+T7b: 2.000000 3.000000
+T7c: 3
+T8a: 10
+T8b: 20
+T8c: 30
+T9: 42
+T10a: 1
+T10b: 1.000000
+T10c: 9.000000
+--- struct static shorthand ---
+S1: 3.000000 4.000000
+S2: 5.000000 6.000000
+S3: 7.000000 8.000000
+S4: 0.000000 0.000000
+S4: 1.000000 0.000000
+S5: 60
+S6: 8.000000 8.000000 8.000000 8.000000
+S6: 8.000000 16.000000 8.000000 16.000000
+S6: 0.000000 12.000000 0.000000 12.000000
+S7: 7
+S8: 3.000000 4.000000
+S8q: 1.000000 2.000000
+S9: 4.000000 6.000000
+S10: 4.000000 6.000000
+--- edge cases ---
+E1: 5.000000 1.000000 2.000000
+E2: 9 1.000000 2.000000
+E3: 1
+E4: 4.000000 6.000000
+E5: 42
+E6: 1
+E7: 20.000000 10.000000
+=== DONE ===

examples/expected/0020-basic-inline-if-return-fallthrough.exit

@@ -0,0 +1 @@
+1

examples/expected/0020-basic-inline-if-return-fallthrough.stderr

@@ -0,0 +1 @@
+

examples/expected/0020-basic-inline-if-return-fallthrough.stdout

@@ -0,0 +1 @@
+

examples/expected/0021-basic-expression-bodied-fn.exit

@@ -0,0 +1 @@
+0

examples/expected/0021-basic-expression-bodied-fn.stderr

@@ -0,0 +1 @@
+

examples/expected/0021-basic-expression-bodied-fn.stdout

@@ -0,0 +1,5 @@
+double: 14
+sum: 7
+answer: 42
+total: 30
+scaled: 90

examples/expected/0022-basic-for-range.exit

@@ -0,0 +1 @@
+0

examples/expected/0022-basic-for-range.stderr

@@ -0,0 +1 @@
+

examples/expected/0022-basic-for-range.stdout

@@ -0,0 +1,10 @@
+i=0
+i=1
+i=2
+n=5
+j=2
+j=3
+j=4
+[0]=A
+[1]=B
+[2]=A

examples/expected/0023-basic-for-by-ref-capture.exit

@@ -0,0 +1 @@
+0

examples/expected/0023-basic-for-by-ref-capture.stderr

@@ -0,0 +1 @@
+

examples/expected/0023-basic-for-by-ref-capture.stdout

@@ -0,0 +1,3 @@
+101 102 103
+circle 2.000000
+none

examples/expected/0024-basic-for-list.exit

@@ -0,0 +1 @@
+0

examples/expected/0024-basic-for-list.stderr

@@ -0,0 +1 @@
+

examples/expected/0024-basic-for-list.stdout

@@ -0,0 +1,4 @@
+sum 60
+sum2 360
+via ptr 360
+boxes 7

examples/expected/0100-types-structs.exit

@@ -0,0 +1 @@
+0

examples/expected/0100-types-structs.stderr

@@ -0,0 +1 @@
+

examples/expected/0100-types-structs.stdout

@@ -0,0 +1,6 @@
+v1: Vec4{x: 1.000000, y: 2.000000, z: 3.000000, w: 0.000000}
+v2: Vec4{x: 4.000000, y: 1.000000, z: 1.000000, w: 3.000000}
+v3: Vec4{x: 2.000000, y: 3.000000, z: 4.000000, w: 0.000000}
+v4: Vec4{x: 9.000000, y: 0.000000, z: 5.000000, w: 6.000000}
+
+Complex{foo: .B(Complex.foo.B{val: hello})}

examples/expected/0101-types-types.exit

@@ -0,0 +1 @@
+0

examples/expected/0101-types-types.stderr

@@ -0,0 +1 @@
+

examples/expected/0101-types-types.stdout

@@ -0,0 +1,4 @@
+a 0 : Foo{a: 0, b: 42, c: 0, d: 17}
+a 1 : Foo{a: 1, b: 42, c: 8, d: 17}
+b: Foo{a: 1, b: 0, c: 101, d: 0}
+Pack{a: 1, b: 0, c: 3, d: 5, f: 9, v: 100, x: 3.500000}

examples/expected/0102-types-union.exit

@@ -0,0 +1 @@
+0

examples/expected/0102-types-union.stderr

@@ -0,0 +1 @@
+

examples/expected/0102-types-union.stdout

@@ -0,0 +1,8 @@
+circle: .circle(3.140000)
+radius: 3.140000
+none: .none
+rect: .rect(Shape.rect{w: 4.000000, h: 2.000000})
+sh: .circle(2.710000)
+rect val: Shape.rect{w: 2.000000, h: 4.000000}
+matched rect
+case : 2

examples/expected/0103-types-categories.exit

@@ -0,0 +1 @@
+0

examples/expected/0103-types-categories.stderr

@@ -0,0 +1 @@
+

examples/expected/0103-types-categories.stdout

@@ -0,0 +1,7 @@
+p: Point{x: 10, y: 20}
+c: Color{r: 255, g: 128, b: 0}
+n: 42
+s: hello
+b: true
+&p: *Point@0xADDR
+&p: *Point@0xADDR

examples/expected/0104-types-union.exit

@@ -0,0 +1 @@
+0

examples/expected/0104-types-union.stderr

@@ -0,0 +1 @@
+

examples/expected/0104-types-union.stdout

@@ -0,0 +1,6 @@
+f=3.140000
+i=1078523331
+x=1.000000
+y=2.000000
+data[0]=1.000000
+data[1]=2.000000

examples/expected/0105-types-flags.exit

@@ -0,0 +1 @@
+0

examples/expected/0105-types-flags.stderr

@@ -0,0 +1 @@
+

examples/expected/0105-types-flags.stdout

@@ -0,0 +1,26 @@
+perms: .read | .write
+  checking: .read | .write
+  - can read
+  - can write
+
+all: .read | .write | .execute
+  checking: .read | .write | .execute
+  - can read
+  - can write
+  - can execute
+
+read only: .read
+  checking: .read
+  - can read
+
+match on flags:
+  execute
+
+window: .vsync | .resizable
+raw value: 68
+
+color: .blue
+raw: 2
+
+0xFF & 0x0F = 15
+1 | 2 | 4 = 7

examples/expected/0106-types-compound-assign-global.exit

@@ -0,0 +1 @@
+0

examples/expected/0106-types-compound-assign-global.stderr

@@ -0,0 +1 @@
+

examples/expected/0106-types-compound-assign-global.stdout

@@ -0,0 +1,10 @@
+add: 13
+sub: 5
+mul: 60
+div: 5
+mod: 1
+and: 15
+or: 255
+xor: 240
+shl: 64
+shr: 8

examples/expected/0107-types-int-cmp-in-float-ternary.exit

@@ -0,0 +1 @@
+0

examples/expected/0107-types-int-cmp-in-float-ternary.stderr

@@ -0,0 +1 @@
+

examples/expected/0107-types-int-cmp-in-float-ternary.stdout

@@ -0,0 +1,2 @@
+ok
+result = 1.000000

examples/expected/0108-types-list-items-assign-big-T.exit

@@ -0,0 +1 @@
+0

examples/expected/0108-types-list-items-assign-big-T.stderr

@@ -0,0 +1 @@
+

examples/expected/0108-types-list-items-assign-big-T.stdout

@@ -0,0 +1,4 @@
+size_of BigNode = 40
+before: sentinel = 3735928559
+after:  sentinel = 3735928559
+OK

examples/expected/0109-types-global-compound-assign.exit

@@ -0,0 +1 @@
+0

examples/expected/0109-types-global-compound-assign.stderr

@@ -0,0 +1 @@
+

examples/expected/0109-types-global-compound-assign.stdout

@@ -0,0 +1,10 @@
+--- Test 1: += (broken) ---
+Expected: 1, 2, 3
+counter=1
+counter=2
+counter=3
+--- Test 2: = x + 1 (works) ---
+Expected: 2, 3, 4
+counter=4
+counter=5
+counter=6

examples/expected/0110-types-global-array-init.exit

@@ -0,0 +1 @@
+0

examples/expected/0110-types-global-array-init.stderr

@@ -0,0 +1 @@
+

examples/expected/0110-types-global-array-init.stdout

@@ -0,0 +1,2 @@
+VALS: -2 -1 42 99 
+PASS

examples/expected/0111-types-global-struct-defaults.exit

@@ -0,0 +1 @@
+0

examples/expected/0111-types-global-struct-defaults.stderr

@@ -0,0 +1 @@
+

examples/expected/0111-types-global-struct-defaults.stdout

@@ -0,0 +1,6 @@
+local         running=true x=42 name=default
+g_empty       running=true x=42 name=default
+g_partial     running=true x=99 name=default
+g_override    running=false x=42 name=default
+g_reorder     running=false x=7 name=hi
+g_positional  running=false x=13 name=pos

examples/expected/0112-types-global-type-alias.exit

@@ -0,0 +1 @@
+0

examples/expected/0112-types-global-type-alias.stderr

@@ -0,0 +1 @@
+

examples/expected/0112-types-global-type-alias.stdout

@@ -0,0 +1 @@
+

examples/expected/0113-types-toplevel-var-type-inference.exit

@@ -0,0 +1 @@
+0

examples/expected/0113-types-toplevel-var-type-inference.stderr

@@ -0,0 +1 @@
+

examples/expected/0113-types-toplevel-var-type-inference.stdout

@@ -0,0 +1,3 @@
+count = 42
+pi    = 3.140000
+flag  = true

examples/expected/0114-types-build-block-convert.exit

@@ -0,0 +1 @@
+0

examples/expected/0114-types-build-block-convert.stderr

@@ -0,0 +1 @@
+

examples/expected/0114-types-build-block-convert.stdout

@@ -0,0 +1,10 @@
+--- void / 0 args ---
+__invoke :: (block_self: *Block) -> void callconv(.c) { typed_fn : (*void) -> void = xx block_self.sx_fn; typed_fn(block_self.sx_env); } return .{ isa = @_NSConcreteStackBlock, flags = 0, reserved = 0, invoke = xx @__invoke, descriptor = xx @__sx_block_descriptor, sx_env = self.env, sx_fn = self.fn_ptr, };
+--- void / bool ---
+__invoke :: (block_self: *Block, arg0: bool) -> void callconv(.c) { typed_fn : (*void, bool) -> void = xx block_self.sx_fn; typed_fn(block_self.sx_env, arg0); } return .{ isa = @_NSConcreteStackBlock, flags = 0, reserved = 0, invoke = xx @__invoke, descriptor = xx @__sx_block_descriptor, sx_env = self.env, sx_fn = self.fn_ptr, };
+--- void / s64, string ---
+__invoke :: (block_self: *Block, arg0: s64, arg1: string) -> void callconv(.c) { typed_fn : (*void, s64, string) -> void = xx block_self.sx_fn; typed_fn(block_self.sx_env, arg0, arg1); } return .{ isa = @_NSConcreteStackBlock, flags = 0, reserved = 0, invoke = xx @__invoke, descriptor = xx @__sx_block_descriptor, sx_env = self.env, sx_fn = self.fn_ptr, };
+--- s32 / f64 ---
+__invoke :: (block_self: *Block, arg0: f64) -> s32 callconv(.c) { typed_fn : (*void, f64) -> s32 = xx block_self.sx_fn; return typed_fn(block_self.sx_env, arg0); } return .{ isa = @_NSConcreteStackBlock, flags = 0, reserved = 0, invoke = xx @__invoke, descriptor = xx @__sx_block_descriptor, sx_env = self.env, sx_fn = self.fn_ptr, };
+--- build done ---
+rt

examples/expected/0115-types-compound-type-in-expression.exit

@@ -0,0 +1 @@
+0

examples/expected/0115-types-compound-type-in-expression.stderr

@@ -0,0 +1 @@
+

examples/expected/0115-types-compound-type-in-expression.stdout

@@ -0,0 +1,10 @@
+size_of(*u8)        = 8
+align_of(*u8)       = 8
+size_of(?u8)        = 2
+size_of([3]u8)      = 3
+size_of((s32)->s32) = 8
+size_of((s32, s32)) = 8
+size_of(Ptr)        = 8
+size_of(Maybe)      = 2
+size_of(Arr)        = 3
+size_of(Cb)         = 8

examples/expected/0116-types-type-alias-size-align.exit

@@ -0,0 +1 @@
+0

examples/expected/0116-types-type-alias-size-align.stderr

@@ -0,0 +1 @@
+

examples/expected/0116-types-type-alias-size-align.stdout

@@ -0,0 +1,7 @@
+direct s32:        4
+alias s32:         4
+chain s32:         4
+align alias:       4
+align chain:       4
+size struct-alias: 16
+align struct-alias:8

examples/expected/0117-types-block-string-arg.exit

@@ -0,0 +1 @@
+0

examples/expected/0117-types-block-string-arg.stderr

@@ -0,0 +1 @@
+

examples/expected/0117-types-block-string-arg.stdout

@@ -0,0 +1 @@
+got: <hello>

examples/expected/0118-types-type-all-interactions.exit

@@ -0,0 +1 @@
+0