Add Genre / Tag support

[arthurmelton]

It would be cool if it would tag the songs to add their genre. I know deezer atleast provides this with their api, but its annoying that its not in musicbrainz. https://wiki.musicbrainz.org/Genre (You supply it in the tag page.)

The main problem is I don't see any way of doing this during the initial creation so I think it has to be after the user has created the release.

[arthurmelton]

(Also did not know if I should comment on the road map or make a new issue, you can close this issue if you want it in the roadmap.)

[kellnerd]

Yes, it has to be a separate step, probably on the release actions page. Tags can be submitted via the MB API, but we need user authentication for that.

(Creating a new issue is the better way, the roadmap is mainly my personal dumping ground where I put my initial list of ideas because I was too lazy to create separate issues for all of them 😅)