Spotify-to-musi

What's Changed
- fixed bug where zero tracks would load based on Spotify's schema change (12)
- migrated pydantic to version 2

**Full Changelog**: https://github.com/hexiro/spotify-to-musi/compare/v2.0.0...v2.0.1

- rewrite w/ async code
- vastly improve `Spotify -> YouTube Music` fetching & conversion algorithm
- improve authenticating w/ Spotify process using `sanic` web server
- better de-duplication of web requests
- cleaner cli ui