For less popular sites, ytdl-sub's custom download archive was not working. This was because we weren't using the right extraction key (though it still worked for YouTube, Bandcamp, Soundcloud, and others). This bugfix should now exactly match yt-dlp's and never be a problem again.
Huge thanks to @Svagtlys for root-causing this 🤝
Music multi-tags (artists, albumartists, etc) were not writing correctly. Fix it by explicitly checking to see if the tag is multi or not in the codebase.
Adds the following prebuilt presets:
```
"Single"
"SoundCloud Discography"
"YouTube Releases"
"YouTube Full Albums"
"Bandcamp"
```
which require no config.yaml to use. Usage examples can be found in the `/examples` directory
* [BUGFIX] Fix missing contains function when checking entries
* remove children func
* [BACKEND] Bandcamp e2e test, update music example
* WIP
* combine soundcloud and all music into music_audio config
* sc fixtures
* updated tests and examples
* bandcamp e2e test
* regen off
* remove url validators
* use bandcamp artist url for more parent coverage
* lint
