ios + ir cleanup

- ios: --target ios/ios-sim shorthands, iOS SDK auto-discovery,
  #framework directive + BuildOptions.add_framework hook,
  .app bundle + Info.plist + codesign (ad-hoc and real),
  --codesign-identity/--provisioning-profile/--entitlements flags,
  modules/std/{objc,uikit}.sx, dynamic class registration,
  typed objc_msgSend cast pattern, UIApplicationMain handoff,
  UIWindow scene attach. Runs on iPhone hardware.
- ir: silent .s64 defaults → loud diagnostics,
  resolveReturnType infers from body, sub-byte int sizes match LLVM,
  tuple type interning includes names, compile errors exit 1
- issue-NNNN convention: resolved bugs rename to focused features
- 50 regression tests passing

tests/expected/08-types.txt

@@ -0,0 +1,4 @@
+a 0 : Foo{a: 0, b: 42, c: 124, d: 17}
+a 1 : Foo{a: 1, b: 42, c: 8, d: 17}
+b: Foo{a: 1, b: 1, c: 101, d: 1}
+Pack{a: 1, b: 0, c: 3, d: 5, f: 9, v: 100, x: 3.500000}

tests/expected/36-protocols.txt

@@ -1,27 +0,0 @@
-P1.1: 3
-P1.2: 30
-P2.1: 42
-P2.2: 150
-P2.3: 5 10
-P2.6: 5 10
-P2.7: 15
-P3.1: 5
-P3.2: 12
-P3.3: 102
-hi hi 
-P4.1: 2
-yo yo 
-P4.2: 2
-P4.3: 6 2
-P5.1: true false
-P5.2: 10 20
-P5.3: true false
-P5.5: true false
-P6.1: true false
-P6.2: true false
-P6.3: true false
-P6.4: 40
-P6.5: 20
-P7.1: 30
-P7.2: 10 300
-=== DONE ===

tests/expected/55-err-field-not-found.exit

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

tests/expected/55-err-field-not-found.txt

@@ -0,0 +1 @@
+/Users/agra/projects/sx/examples/55-err-field-not-found.sx:8:15: error: field 'bogus' not found on type 'Vec'

tests/expected/56-err-tuple-oob.exit

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

tests/expected/56-err-tuple-oob.txt

@@ -0,0 +1 @@
+/Users/agra/projects/sx/examples/56-err-tuple-oob.sx:6:15: error: field '42' not found on type 'tuple'

tests/expected/57-err-dot-shorthand.exit

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

tests/expected/57-err-dot-shorthand.txt

@@ -0,0 +1 @@
+/Users/agra/projects/sx/examples/57-err-dot-shorthand.sx:5:10: error: cannot infer enum type for '.Foo' — use an explicit type or assign to a typed variable

tests/expected/58-infer-return-type.exit

@@ -0,0 +1 @@
+178

tests/expected/58-infer-return-type.txt

@@ -0,0 +1 @@
+

tests/expected/59-err-bad-variant.exit

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

tests/expected/59-err-bad-variant.txt

@@ -0,0 +1 @@
+/Users/agra/projects/sx/examples/59-err-bad-variant.sx:18:14: error: no variant 'Bogus' on type 'Shape'

tests/expected/60-frameworks.exit

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

tests/expected/60-frameworks.txt

@@ -0,0 +1 @@
+

tests/expected/61-objc-roundtrip.exit

@@ -0,0 +1 @@
+209

tests/expected/61-objc-roundtrip.txt

@@ -0,0 +1 @@
+

tests/expected/62-objc-class.exit

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

tests/expected/62-objc-class.txt

@@ -0,0 +1 @@
+

tests/expected/65-add-framework.exit

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

tests/expected/65-add-framework.txt

@@ -0,0 +1 @@
+