test: group examples into per-category folders

Move examples/*.sx and their expected/ snapshots into per-category
subfolders (examples/<category>/...). Folder = leading filename token,
with ffi-objc/ffi-jni kept whole; filenames are unchanged. The corpus
runner and LSP sweep now discover each category's expected/ dir, while
issues/ stays flat. Example 1058's repo-root-relative companion import
is made file-relative. Path strings embedded in 164 snapshots were
regenerated (path-only changes). Test-layout docs in CLAUDE.md updated.

examples/basic/expected/0010-basic-basic.exit

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

examples/basic/expected/0010-basic-basic.stderr

@@ -0,0 +1 @@
+

examples/basic/expected/0010-basic-basic.stdout

@@ -0,0 +1 @@
+

examples/basic/expected/0011-basic-stdout.exit

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

examples/basic/expected/0011-basic-stdout.stderr

@@ -0,0 +1 @@
+

examples/basic/expected/0011-basic-stdout.stdout

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

examples/basic/expected/0012-basic-shadow.exit

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

examples/basic/expected/0012-basic-shadow.stderr

@@ -0,0 +1 @@
+

examples/basic/expected/0012-basic-shadow.stdout

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

examples/basic/expected/0013-basic-defer.exit

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

examples/basic/expected/0013-basic-defer.stderr

@@ -0,0 +1 @@
+

examples/basic/expected/0013-basic-defer.stdout

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

examples/basic/expected/0014-basic-code.exit

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

examples/basic/expected/0014-basic-code.stderr

@@ -0,0 +1 @@
+

examples/basic/expected/0014-basic-code.stdout

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

examples/basic/expected/0015-basic-demo.exit

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

examples/basic/expected/0015-basic-demo.stderr

@@ -0,0 +1 @@
+

examples/basic/expected/0015-basic-demo.stdout

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

examples/basic/expected/0016-basic-while.exit

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

examples/basic/expected/0016-basic-while.stderr

@@ -0,0 +1 @@
+

examples/basic/expected/0016-basic-while.stdout

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

examples/basic/expected/0017-basic-conditions.exit

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

examples/basic/expected/0017-basic-conditions.stderr

@@ -0,0 +1 @@
+

examples/basic/expected/0017-basic-conditions.stdout

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

examples/basic/expected/0018-basic-quicksort.exit

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

examples/basic/expected/0018-basic-quicksort.stderr

@@ -0,0 +1 @@
+

examples/basic/expected/0018-basic-quicksort.stdout

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

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

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

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

@@ -0,0 +1 @@
+

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

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

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

@@ -0,0 +1 @@
+

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

@@ -0,0 +1 @@
+

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

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

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

@@ -0,0 +1 @@
+

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

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

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

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

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

@@ -0,0 +1 @@
+

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

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

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

@@ -0,0 +1 @@
+

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

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

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

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

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

@@ -0,0 +1 @@
+

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

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

examples/basic/expected/0025-basic-literals.exit

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

examples/basic/expected/0025-basic-literals.stderr

@@ -0,0 +1 @@
+

examples/basic/expected/0025-basic-literals.stdout

@@ -0,0 +1,18 @@
+=== 1. Literals ===
+decimal: 42
+hex: 255
+binary: 10
+float: 3.140000
+f64: 2.718281
+true: true
+false: false
+escapes: hello	world
+multiline: line1
+line2
+heredoc: raw heredoc
+
+undef-then-set: 77
+enum-lit: .green
+null-ptr: null
+string-len: 5
+empty-string: 0

examples/basic/expected/0026-basic-operators.exit

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

examples/basic/expected/0026-basic-operators.stderr

@@ -0,0 +1 @@
+

examples/basic/expected/0026-basic-operators.stdout

@@ -0,0 +1,60 @@
+=== 2. Operators ===
+add: 7
+sub: 7
+mul: 42
+div: 5
+mod: 2
+neg: -5
+eq: true
+neq: true
+lt: true
+gt: true
+le: true
+ge: true
+chain: true
+chain-gt: true
+chain-mixed: true
+eq-chain: true
+eq-chain-f: false
+band: 15
+bor: 7
+bxor: 240
+bxor2: 5
+bnot: -1
+bnot2: -2
+shl: 16
+shr: 16
+shl2: 24
+shr2: 127
+band-var: 15
+bor-var: 7
+bxor-var: 240
+shl-var: 16
+shr-var: 15
+bnot-var: -16
+and-assign: 15
+or-assign: 255
+xor-assign: 240
+shl-assign: 256
+shr-assign: 16
+mod-var: 2
+and: true
+and-false: false
+or: true
+or-false: false
+short-and: false
+short-or: true
+ca+=: 15
+ca-=: 12
+ca*=: 24
+ca/=: 4
+prec1: 14
+prec2: 20
+xx-cast: 200
+widen-u8-i64: 200
+widen-i32-f64: 42.000000
+widen-f32-f64: 1.500000
+widen-u8-i16: 100
+xx-i64-i32: 12345
+xx-f64-f32: 1.500000
+xx-f64-i32: 7

examples/basic/expected/0027-basic-control-flow.exit

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

examples/basic/expected/0027-basic-control-flow.stderr

@@ -0,0 +1 @@
+

examples/basic/expected/0027-basic-control-flow.stdout

@@ -0,0 +1,26 @@
+=== 4. Control Flow ===
+ite: 1
+ite-both: 10 20
+if-block: yes
+if-no-else: after
+nested-if: deep
+if-else-if: second
+if-block-expr: 15
+while: 5
+while-false: skipped
+while-break: 7
+while-continue: 25
+while-sum: 55
+nested-while: 9
+nested-break: 2 2
+for: 10 20 30 40
+for-print: 10 20 30 40
+for-idx: 0 1 2 3
+for-2arg: 10@0 20@1 30@2 40@3
+for-break: 10 20
+for-continue: 10 30 40
+for-slice: 10 20 30
+for-slice-idx: 0:10 1:20 2:30
+for-nested: (0,0) (0,1) (1,0) (1,1)
+for-break-idx: 2
+multi: 1 2 3

examples/basic/expected/0028-basic-functions.exit

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

examples/basic/expected/0028-basic-functions.stderr

@@ -0,0 +1 @@
+

examples/basic/expected/0028-basic-functions.stdout

@@ -0,0 +1,21 @@
+=== 5. Functions ===
+const: 42
+typed-const: 3.140000
+default-init: 0
+implicit-ret: 42
+early-ret: 5
+early-ret2: 99
+void-return: ok
+generic-i32: 42
+generic-f32: 1.500000
+generic-bool: true
+generic-multi: 30
+lambda: 14
+lambda-ret: 5.000000
+local-fn: 7
+fn-nested: 26
+varargs: 15
+spread: 60
+fp: 7
+fp-reassign: 12
+fp-apply: 30

examples/basic/expected/0029-basic-scoping.exit

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

examples/basic/expected/0029-basic-scoping.stderr

@@ -0,0 +1 @@
+

examples/basic/expected/0029-basic-scoping.stdout

@@ -0,0 +1,23 @@
+=== 6. Scoping ===
+inner: 200
+outer: 100
+shadow-type: 42
+shadow-type: 3.140000
+nest3: 3
+nest2: 2
+nest1: 1
+scope-isolate: 100
+scope-reuse: 1
+scope-reuse: 2
+scope-reuse: 1
+defer-a
+defer-b
+defer-c
+d4
+d3
+d2
+d1
+inner-defer
+outer-defer
+defer-in-if: body
+defer-in-if: deferred

examples/basic/expected/0030-basic-builtins.exit

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

examples/basic/expected/0030-basic-builtins.stderr

@@ -0,0 +1 @@
+

examples/basic/expected/0030-basic-builtins.stdout

@@ -0,0 +1,31 @@
+=== 7. Builtins ===
+out-ok
+sqrt: 3.000000
+sqrt-f64: 4.000000
+sizeof-i32: 4
+sizeof-f64: 8
+sizeof-struct: 8
+alignof-u8: 1
+alignof-i32: 4
+alignof-i64: 8
+alignof-struct: 4
+typeof: int
+typeof-float: float
+typeof-string: string
+typeof-bool: bool
+typeof-struct: struct
+typeof-enum: enum
+typename: Point
+fieldcount: 2
+fieldcount-enum: 3
+fieldname0: x
+fieldname1: y
+fieldname-enum0: red
+fieldname-enum2: blue
+fieldval0: 11
+fieldval1: 22
+fieldidx: 1
+fieldidx-tagged: 0
+fieldidx-tagged2: 2
+cast: 3
+cast-int-f64: 42.000000

examples/basic/expected/0031-basic-local-fn-return.exit

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

examples/basic/expected/0031-basic-local-fn-return.stderr

@@ -0,0 +1 @@
+

examples/basic/expected/0031-basic-local-fn-return.stdout

@@ -0,0 +1,3 @@
+=== 19. Local Fn Return ===
+local-struct: 42 99
+local-enum: .circle(2.500000)

examples/basic/expected/0032-basic-ufcs-return-type.exit

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

examples/basic/expected/0032-basic-ufcs-return-type.stderr

@@ -0,0 +1 @@
+

examples/basic/expected/0032-basic-ufcs-return-type.stdout

@@ -0,0 +1,3 @@
+=== 20. UFCS Return Type ===
+direct: 7
+ufcs: 7

examples/basic/expected/0033-basic-if-struct.exit

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

examples/basic/expected/0033-basic-if-struct.stderr

@@ -0,0 +1 @@
+

examples/basic/expected/0033-basic-if-struct.stdout

@@ -0,0 +1,3 @@
+=== 22. If-Struct ===
+if-struct: 10 20
+else-struct: 30 40

examples/basic/expected/0034-basic-string-comparison.exit

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

examples/basic/expected/0034-basic-string-comparison.stderr

@@ -0,0 +1 @@
+

examples/basic/expected/0034-basic-string-comparison.stdout

@@ -0,0 +1,5 @@
+=== 24. String Comparison ===
+str-eq: true
+str-neq: true
+str-diff: false
+empty-eq: true

examples/basic/expected/0035-basic-array-loop-mutation.exit

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

examples/basic/expected/0035-basic-array-loop-mutation.stderr

@@ -0,0 +1 @@
+

examples/basic/expected/0035-basic-array-loop-mutation.stdout

@@ -0,0 +1,3 @@
+=== 25. Array Loop Mutation ===
+loop-fill: 1 2 3 4
+compound: 13

examples/basic/expected/0036-basic-ufcs-aliases.exit

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

examples/basic/expected/0036-basic-ufcs-aliases.stderr

@@ -0,0 +1 @@
+

examples/basic/expected/0036-basic-ufcs-aliases.stdout

@@ -0,0 +1,12 @@
+=== UFCS Aliases ===
+42
+42
+42
+42
+42
+3
+3
+3
+2
+1
+99

examples/basic/expected/0037-basic-trailing-commas.exit

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

examples/basic/expected/0037-basic-trailing-commas.stderr

@@ -0,0 +1 @@
+

examples/basic/expected/0037-basic-trailing-commas.stdout

@@ -0,0 +1,2 @@
+=== Trailing Commas ===
+trailing commas ok

examples/basic/expected/0038-basic-dead-code-after-terminator.exit

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

examples/basic/expected/0038-basic-dead-code-after-terminator.stderr

@@ -0,0 +1 @@
+

examples/basic/expected/0038-basic-dead-code-after-terminator.stdout

@@ -0,0 +1,4 @@
+const_one=1
+raised=0
+clamp_hi=10
+clamp_lo=7

examples/basic/expected/0039-basic-free-fn-ufcs-pointer-receiver.exit

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

examples/basic/expected/0039-basic-free-fn-ufcs-pointer-receiver.stderr

@@ -0,0 +1 @@
+

examples/basic/expected/0039-basic-free-fn-ufcs-pointer-receiver.stdout

@@ -0,0 +1,2 @@
+a=11 b=12 n=12
+after reset n=0

examples/basic/expected/0040-basic-block-value.exit

@@ -0,0 +1 @@
+35

examples/basic/expected/0040-basic-block-value.stderr

@@ -0,0 +1 @@
+

examples/basic/expected/0040-basic-block-value.stdout

@@ -0,0 +1 @@
+block-value total: 35

examples/basic/expected/0041-basic-block-value-reject.exit

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

examples/basic/expected/0041-basic-block-value-reject.stderr

@@ -0,0 +1,5 @@
+error: function returns 'i32' but the last expression's value is discarded by this `;` — drop the `;` to return it (or use an explicit `return`)
+  --> examples/basic/0041-basic-block-value-reject.sx:10:10
+   |
+10 |     n * 2;
+   |          ^

examples/basic/expected/0041-basic-block-value-reject.stdout

@@ -0,0 +1 @@
+

examples/basic/expected/0042-basic-block-value-destructure.exit

@@ -0,0 +1 @@
+12

examples/basic/expected/0042-basic-block-value-destructure.stderr

@@ -0,0 +1 @@
+