Update Transition API

[Kyle-Ye]

No description provided.

[augmentcode]

🤖 Augment PR Summary

Summary: Updates the Transition API surface and implementations to align with the audited SwiftUI 6.5.4 behavior.

Changes:

• Adds new transition implementations: AsymmetricTransition, CombiningTransition, FilteredTransition, ModifierTransition, and PushTransition.
• Introduces new convenience APIs on AnyTransition/Transition: asymmetric, combined, animation, modifier, and push(from:).
• Adds OffsetTransition and wires it to AnyTransition.offset(...)/Transition.offset(...).
• Extends _OffsetEffect with protobuf encode/decode support.
• Makes Edge.translationOffset(for:) available outside MoveTransition’s file for reuse (e.g. push transitions).
• Simplifies Transition helpers that extract hasContentTransition and contentTransitionEffects results.
• Moves OpacityEffect.swift under Render/RendererEffect (rename-only change).

Technical Notes: Composite transitions now participate in content transitions by emitting ContentTransition.Effect arrays, including insertion/removal event tagging where appropriate (e.g. asymmetric + push).

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[augmentcode]

Review completed. 2 suggestions posted.

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[codecov]

Codecov Report

❌ Patch coverage is 0% with 194 lines in your changes missing coverage. Please review.
✅ Project coverage is 13.84%. Comparing base (d1e8132) to head (697c240).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...re/Animation/Transition/AsymmetricTransition.swift	0.00%	52 Missing ⚠️
...iftUICore/Render/GeometryEffect/OffsetEffect.swift	0.00%	39 Missing ⚠️
...ftUICore/Animation/Transition/PushTransition.swift	0.00%	34 Missing ⚠️
...ore/Animation/Transition/CombiningTransition.swift	0.00%	30 Missing ⚠️
...Core/Animation/Transition/FilteredTransition.swift	0.00%	25 Missing ⚠️
...Core/Animation/Transition/ModifierTransition.swift	0.00%	7 Missing ⚠️
...nSwiftUICore/Animation/Transition/Transition.swift	0.00%	6 Missing ⚠️
...ftUICore/Animation/Transition/MoveTransition.swift	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #736      +/-   ##
==========================================
- Coverage   13.90%   13.84%   -0.07%     
==========================================
  Files         579      584       +5     
  Lines       34565    34741     +176     
==========================================
+ Hits         4806     4809       +3     
- Misses      29759    29932     +173     

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