- Added AnimationClip class with curve and keyframe management
- Implemented AnimationCurve with multiple interpolation types
- Created AnimationEventMarker for timeline events
- Added AnimationLayer with track and clip playback support
- Implemented blending modes for animation mixing
- Added event system with listeners and triggers
- Included utility functions for time/frame conversion
- Added copy and merge functionality for clips
- Implemented loop and playback control mechanisms
- Added metadata support including author and description
- Included UUID generation for unique identification
- Added frame rate and duration management
- Implemented parameter override system
- Added physics system integration support
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