Adding Items To Collection

[FOSSforlife]

Users should be able to:

• add items manually by artist and title
• add items manually by MBID
• add additional metadata in the creation payload (release date, etc)

The server should automatically:

• fetch metadata from MusicBrainz, either using MBID or by searching artist/title
• merge items that are the same
• follow every step in the chart below upon adding an item

This import function below is what will handle user imports, Spotify/Last.fm/RYM imports, and any other method of adding items.