Add animation codable support and display list effects

[Kyle-Ye]

Changes

• New Codable Animation Types: Introduced CodableAnimation struct to handle protobuf encoding/decoding of animation objects with support for bezier, spring, fluid spring, delay, repeat, and speed modifiers

• Effect Animation System: Added CodableEffectAnimation and DisplayListAnimations module with support for:

  • Offset, scale, rotation, and opacity animations
  • EffectAnimation protocol for animatable effect values
  • EffectAnimator for frame-by-frame evaluation

• Protocol Refactoring:

  • Moved EncodableAnimation protocol definition to CustomAnimation.swift
  • Updated _DisplayList_AnyEffectAnimation to use CodableEffectAnimation.Tag
  • Made animation modifiers (DelayAnimation, SpeedAnimation) package-scoped

• Test Coverage: Added comprehensive protobuf encoding/decoding tests for:

  • CodableAnimationTests: All animation types and modifiers
  • CodableEffectAnimationTests: All effect animation types
  • CodableEffectAnimationDualTests: SwiftUI compatibility tests

• Test Infrastructure: Enhanced ProtobufTestHelper to support non-Equatable types through re-encoding validation

[codecov]

Codecov Report

❌ Patch coverage is 71.12299% with 54 lines in your changes missing coverage. Please review.
✅ Project coverage is 27.19%. Comparing base (76c61a9) to head (17994e8).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...ore/Render/DisplayList/DisplayListAnimations.swift	36.76%	43 Missing ⚠️
...Animation/Animation/Codable/CodableAnimation.swift	94.23%	3 Missing ⚠️
...ion/Animation/Codable/CodableEffectAnimation.swift	89.28%	3 Missing ⚠️
...iftUICore/Animation/Animation/DelayAnimation.swift	0.00%	2 Missing ⚠️
.../Animation/Animation/CustomAnimationModifier.swift	50.00%	1 Missing ⚠️
...iftUICore/Animation/Animation/SpeedAnimation.swift	0.00%	1 Missing ⚠️
...Core/Render/DisplayList/DisplayListViewCache.swift	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #849      +/-   ##
==========================================
+ Coverage   26.53%   27.19%   +0.65%     
==========================================
  Files         671      673       +2     
  Lines       44009    44166     +157     
==========================================
+ Hits        11676    12009     +333     
+ Misses      32333    32157     -176     

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