consts/sizes library

1. mediax package
2. documentation
3. consts/sizes.dart

mediax package

1. Libraries
2. consts/colors
3. consts/consts
4. consts/sizes
5. consts/strings
6. enums/playback_state
7. enums/resize_mode
8. mediax
9. models/data_source
10. models/playback_error
11. models/video_size
12. utils/debouncer
13. views/player_controller_view
14. views/player_view
15. views/slider_track_shape
16. views/views