Merge:
https://github.com/metabrainz/metabrainz-logos
Into:
https://github.com/metabrainz/design-system

Put into a 'logos' folder.

Brought up in the weekly meeting, no complaints:
https://chatlogs.metabrainz.org/libera/metabrainz/2022-04-25/?msg=4995967&page=5