v2.0.0

• Restructured package
• Use chewie_audio instead of flutter_sound_lite package for better iOS support
• Use CupertinoContextMenu on iOS and MacOS when there are context menu items registered on a PreviewMediaWidget
• Use fallbackBuilder instead of fallbackWidget for better performance in the PreviewMediaWidget and InteractiveMediaWidget
• Removed WidgetRegistry as the fallback builders are a better way to control fallback generation