Support setting CC license for Bandcamp provider #19
Description
Bandcamp contains many Creative Commons licensed releases, see for example https://aeonsable.bandcamp.com/album/aenigma-2023
The Bandcamp importer user script supports reading the license information and sets the license URL when seeding, see https://github.com/murdos/musicbrainz-userscripts/blob/master/bandcamp_importer.user.js#L188-L195
Similar could be done in the Bandcamp provider.