- Created SkeletonDrawable class wrapping spine_skeleton_drawable C functions
- Implemented AnimationStateEventManager singleton for event listener management
- Added helper types: Bounds and Vector structs
- Added extensions for Skeleton (bounds, getPosition)
- Added extensions for Skin (getEntries to iterate attachments)
- Added extensions for BonePose (coordinate transformations)
- Added extensions for AnimationState and TrackEntry (event listeners)
- Created skeleton_drawable_test_swift.swift using SpineSwift high-level API
- Updated test Package.swift to include SpineSwift dependency
- SpineSwift module now compiles with 0 errors
This completes the port of the high-level API from spine-flutter's spine_dart.dart
to SpineSwift, providing a clean Swift API that mirrors the Dart implementation.
