* [feature] Provide .well-known/host-meta endpoint
This adds the host-meta endpoint as Mastodon clients use this to
discover the API domain to use when the host and account domains aren't
the same.
* Address review comments
* start fiddling
* the ol' fiddle + update
* start working on fetching statuses
* poopy doopy doo where r u uwu
* further adventures in featuring statuses
* finishing up
* fmt
* simply status unpin loop
* move empty featured check back to caller function
* remove unnecessary log.WithContext calls
* remove unnecessary IsIRI() checks
* add explanatory comment about status URIs
* change log level to error
* better test names
* implement status pin client api + web handler
* make test names + comments more descriptive
* don't use separate table for status pins
* remove unused add + remove checking
* tidy up + add some more tests