Allow the publisher page as an attribution source

[Nebelherr23]

Is your feature request related to a problem? Please describe.
I recently started updating some series and wanted to add a link to the publisher page as attribution source, but couldn't figure out a way to make this possible

Describe the solution you'd like
A Source Option "Publisher" with the possibility to link to the publishers page (Image, Aftershock, whoever one could think of)

Additional context
Dialog in question

[bpepple]

Couple of questions that would need to be resolved:

1. What label to use? Something like 'Publisher', 'Website' or 'URL'?
2. What license should be displayed (if any) for the content?