feat: Add Donation Flair Settings Page

[anshg1214]

No description provided.

[MonkeyDo]

Thanks for setting that up!
Some preliminary comments

[pep8speaks]

Hello @anshg1214! Thanks for updating this PR. We checked the lines you've touched for PEP 8 issues, and found:

• In the file listenbrainz/db/external_service_oauth.py:

Line 12:131: E501 line too long (138 > 130 characters)

• In the file listenbrainz/listens_importer/lastfm.py:

Line 76:5: E303 too many blank lines (2)
Line 100:5: E303 too many blank lines (2)

[MonkeyDo]

I guess this is about ready to merge, what do you think?

I've started working on a PR to add some CSS flairs, as you work on the username component (I checked, and it will indeed be required for some of the animations). Then we can tie it all together!

[anshg1214]

Yes, this PR is ready for merge. I'll open a followup PR for adding a username component

[MonkeyDo]

LGTM