For music presets, adds `track_genre_default` as an override variable (defaults to Unset)
For TV show presets, adds `tv_show_genre_default` and `tv_show_content_rating_default`, which default to 'ytdl-sub' and 'TV-14'
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
