Create Copyright and Phonographic Copyright relationships

[SheamusPatt]

Harmony currently adds an Annotation to MusicBrainz releases with © Copyright and ℗ Phonographic Copyright details where information exists. However, there are relationships where such information can be entered, which would seem a more appropriate place for this information and would also serve to link the artist or label referred to back to the release.
In the UI, this is accessible via Edit Relationships.

[arsinclair]

There's no way to seed these relationships with MB UI as of yet.

Until that lands, there's only one 'sane' way to do it: Harmony passes the data to the Relationship Editor via the URL, and then a user extension running on the client at MB's side parses this from the URL and populates the fields. Still, the entity matching will have to be done manually, since copyright line is just a plain text.

[kellnerd]

This is essentially a duplicate of #80, which I had closed because it is impossible to implement for now.