Overhaul VideoJS dependency manager

[syeopite]

• Refactors code in the script

• Simplify workarounds for dependencies with differing structure

• Adds check for missing dependency files in assets/videojs/* in case of improper installation

• Use native Crystal digest for checksum instead of system command

• Don't clear the cache each time the script is, instead there's the parameter --clear-cache or the compile time flag clear_player_dependencies_cache when ran through Invidious.

• Changes the default cache directly to be relative to the Invidious repo

• Adds ability to use a custom NPM registry

• Adds ability to change the cache directory

• Allows using pre-existing downloaded tarballs of the dependencies

• Logs checksum when validation fails.

• Allows skipping checksum with the --skip-checksum parameter when calling the script directly, or the skip_player_dependencies_checksum compile-time flag when used through Invidious