* fix: refactor side loaded text tracks management
More textTracks in source.
android/ios: ensure text tracks are not selected by default
android/ios make textTrack field not nullable
clean up doc
check compatibility with the old api
Add comments on deprecated JS apis
Apply API change on basic sample
* chore: fix linter
* fix(ios): fix build with caching & remove warnings
Converts iOS implementation from Objective-c to Swift
# During the conversion process some updates to the code structure were also made
- Modularize codebase from single file to smaller focused files
- Untangled large nested IF statements
- Added more null checks, since Swift is more strict with null pointers
- Added property to allow for decoding of local video sources with self contained key for offline playback
- Updates example apps to test react-native 0.63.4 and uses auto native dependency imports for android and ios
