More lottie fixes

[kunitoki]

This pull request adds support for the "Auto-Orient" feature in Lottie animation layers, ensuring that layers can align their local X axis with their instantaneous motion path, as specified by the Lottie "ao" property. The implementation includes updates to the animation transform logic, Lottie file parsing and serialization, and comprehensive tests to verify correct behavior and roundtrip preservation.

Auto-Orient Feature Implementation

• Added an autoOrient property to the AnimationTransform class, and updated the toAffineTransform method to rotate the layer according to its motion path when autoOrient is enabled. [1] [2]
• Updated the Lottie reader and writer to correctly parse and serialize the "ao" (auto-orient) property for each layer, ensuring that this setting is preserved when reading and writing Lottie files. [1] [2]

Renderer Logic Improvements

• Improved group rendering logic to better handle nested groups and their paint/geometry relationships, specifically by detecting direct paint children and adjusting geometry feeding behavior accordingly. [1] [2]

Testing Enhancements

• Added new tests to verify that auto-orient is correctly parsed from Lottie data, that the affine transform aligns with the motion path when enabled, and that roundtripping through the writer preserves the property. [1] [2] [3]

Test Data

• Added a new bell.json Lottie file to the test data for validating solid color and auto-orient parsing.

[codecov]

Codecov Report

❌ Patch coverage is 65.65657% with 34 lines in your changes missing coverage. Please review.
✅ Project coverage is 79.35%. Comparing base (ceebb70) to head (4308706).
⚠️ Report is 18 commits behind head on main.

Files with missing lines	Patch %	Lines
...nimation/renderer/yup_AnimationRenderResources.cpp	57.14%	18 Missing ⚠️
modules/yup_animation/io/yup_LottieReader.cpp	59.45%	15 Missing ⚠️
...s/yup_animation/renderer/yup_AnimationRenderer.cpp	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #137      +/-   ##
==========================================
+ Coverage   79.32%   79.35%   +0.02%     
==========================================
  Files         712      712              
  Lines       70398    70380      -18     
==========================================
+ Hits        55846    55849       +3     
+ Misses      14552    14531      -21     

Files with missing lines	Coverage Δ
modules/yup_animation/animation/yup_Animation.cpp	100.00% <100.00%> (ø)
...ules/yup_animation/core/yup_AnimationTransform.cpp	75.22% <100.00%> (+1.69%)	⬆️
...odules/yup_animation/core/yup_AnimationTransform.h	100.00% <ø> (ø)
...s/yup_animation/io/yup_LottieExpressionEvaluator.h	88.88% <ø> (ø)
modules/yup_animation/io/yup_LottieWriter.cpp	73.58% <100.00%> (+0.05%)	⬆️
...les/yup_animation/model/yup_AnimationComposition.h	87.50% <ø> (ø)
..._animation/renderer/yup_AnimationRenderResources.h	66.66% <ø> (ø)
...s/yup_animation/renderer/yup_AnimationRenderer.cpp	70.52% <80.00%> (+0.15%)	⬆️
modules/yup_animation/io/yup_LottieReader.cpp	75.69% <59.45%> (+1.36%)	⬆️
...nimation/renderer/yup_AnimationRenderResources.cpp	46.90% <57.14%> (ø)

... and 3 files with indirect coverage changes

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