Migrate iOS implementation to Swift Package Manager
- Updated iOS implementation to use Swift Package Manager
- Removed legacy Objective-C/Swift bridge files
- Added new Swift package structure in ios/flutter_video_info/
- Updated podspec to reference Swift package sources
- Improved iOS deployment target to 11.0
- Updated README with Swift Package Manager instructions
- Version bump to 1.3.4
- Added FVM support with .fvmrc
- Updated dependencies for Flutter 3.29 compatibility
Co-Authored-By: Claude noreply@anthropic.com