Complete gesture view modifier support

[Kyle-Ye]

Summary

• Implement gesture view modifier responder wiring for masked view gestures, subview gesture propagation, and debug wrapping.
• Add simultaneous and high-priority gesture modifier/combiners, plus optional gesture support.
• Add public View gesture overloads for GestureMask, isEnabled, and named gestures with DocC.
• Add gesture debug tree formatting coverage and compatibility tests.

[augmentcode]

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[codecov]

Codecov Report

❌ Patch coverage is 27.64228% with 178 lines in your changes missing coverage. Please review.
✅ Project coverage is 26.29%. Comparing base (cf9a0d4) to head (8d186d8).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...wiftUICore/Event/Gesture/GestureViewModifier.swift	0.00%	96 Missing ⚠️
...s/OpenSwiftUICore/Event/Gesture/GestureDebug.swift	61.90%	40 Missing ⚠️
...es/OpenSwiftUICore/Event/Gesture/GestureMask.swift	0.00%	30 Missing ⚠️
...penSwiftUICore/Event/Gesture/OptionalGesture.swift	0.00%	10 Missing ⚠️
Sources/OpenSwiftUICore/Util/AnyAttributeFix.swift	60.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #905      +/-   ##
==========================================
+ Coverage   26.28%   26.29%   +0.01%     
==========================================
  Files         710      712       +2     
  Lines       49705    49987     +282     
==========================================
+ Hits        13063    13144      +81     
- Misses      36642    36843     +201     

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