ffmpeg_kit_extended_flutter_platform_interface library

1. ffmpeg_kit_extended_flutter package
2. documentation
3. ffmpeg_kit_extended_flutter_platform_interface.dart

ffmpeg_kit_extended_flutter package

1. Libraries
2. build_hook/apple
3. build_hook/config
4. build_hook/native_artifact
5. ffmpeg_kit_extended_flutter
6. ffmpeg_kit_extended_flutter_method_channel
7. ffmpeg_kit_extended_flutter_platform_interface
8. ffmpeg_kit_extended_flutter_web