[Tagging] Proposal: logo tag. Opinions?

[SwiftFast]

> using Wikidata where possible, but Wikidata has notability guidelines
> that will probably prevent creating an item for smaller stores that
> are
> not part of a major national or international brand.

One could refine the proposal: Only add a "logo" tag for entities which
are not allowed in wikidata. Otherwise just use the wikidata link (and
create the wikidata entity if nonexistent).