Add safe NSValue geometry wrappers

[Kyle-Ye]

Summary

Adds a UIFoundation shim for NSValue geometry boxing so OpenSwiftUICore can use CGPoint, CGSize, and CGRect initializers without depending on UIKit.

The new wrappers first call the platform implementation when selectors like valueWithCGSize: are available, which should keep the UIKit/iOS path aligned with the system behavior. When those selectors are unavailable, such as on macOS where Foundation exposes NSValue(size:) instead of NSValue(cgSize:), the wrappers fall back to valueWithBytes:objCType: using the CoreGraphics encoding.

Changes

• Add UIGeometry.h / UIGeometry.m under OpenSwiftUI_SPI/Shims/UIFoundation.
• Expose Swift names for NSValue(cgPoint:), NSValue(cgSize:), and NSValue(cgRect:) through OpenSwiftUI-safe wrappers.
• Update display-list and shape-layer property boxing to use the new cg* APIs via UIFoundation_Private.

Validation

• swift package describe --type json
• OPENSWIFTUI_USE_LOCAL_DEPS=1 swift package describe --type json
• swift build --target OpenSwiftUICore

Builds completed successfully with existing warnings only.

[augmentcode]

🤖 Augment PR Summary

Summary: This PR adds OpenSwiftUI-safe NSValue geometry boxing APIs so OpenSwiftUICore can construct NSValue from CGPoint, CGSize, and CGRect without importing UIKit.

Changes:

• Introduces a new UIFoundation shim (UIGeometry.h/.m) that exposes NSValue(cgPoint:), NSValue(cgSize:), and NSValue(cgRect:) to Swift via UIFoundation_Private.
• The shim calls platform implementations (e.g. valueWithCGSize:) when available to match system behavior, and falls back to valueWithBytes:objCType: otherwise.
• Updates display-list and shape-layer boxing to use the new cg* initializers and imports UIFoundation_Private where needed.

Technical Notes: Runtime selector checks keep iOS/UIKit behavior aligned while still supporting macOS/Foundation differences in geometry boxing APIs.

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[augmentcode]

Review completed. 1 suggestion posted.

Comment augment review to trigger a new review at any time.

[augmentcode]

valueWithCGPoint_openswiftui_safe_wrapper/valueWithCGSize_openswiftui_safe_wrapper/valueWithCGRect_openswiftui_safe_wrapper look like Swift-mapped initializers; consider returning instancetype instead of NSValue * so Swift imports them as returning Self (and it stays correct if NSValue is subclassed/class-clustered).

Severity: low

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[codecov]

Codecov Report

❌ Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 25.70%. Comparing base (39e3855) to head (bfc2c01).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...ore/Render/DisplayList/DisplayListAsyncLayer.swift	0.00%	2 Missing ⚠️
Sources/OpenSwiftUICore/Shape/ShapeLayer.swift	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #862   +/-   ##
=======================================
  Coverage   25.69%   25.70%           
=======================================
  Files         677      677           
  Lines       46905    46905           
=======================================
+ Hits        12053    12056    +3     
+ Misses      34852    34849    -3     

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