* feat: implement opacity to control visibility of subtitles
implemented per discussion on https://github.com/react-native-video/react-native-video/issues/3579
updated docs and linked onTextTrackDataChanged to the subtitle style to clarify intent on how to control visibility.
* chore: update type so that we use a union of 0 1 vs any number
* chore: run ktlint to get rid of white spaces
* feat: add ability to have range of numbers for opacity; while, 0 will still not render the subtitles.
added util function for safeGetFloat
updated types
* feat: add ability to suppress subtitles with opacity 0
add data structure for subtitle styles for extensibility
* chore: run yarn check-ios
* chore: update documentation to clarify differences between android and ios
* Update android/src/main/java/com/brentvatne/exoplayer/ExoPlayerView.java
Co-authored-by: Olivier Bouillet <62574056+freeboub@users.noreply.github.com>
---------
Co-authored-by: Olivier Bouillet <62574056+freeboub@users.noreply.github.com>
