* Servantify get users by unqualified ids or handles

* Implement get users by qualified ids or handles

* Fix ToSchema instance for Qualified ID

* Create a newtype for CommaSeparatedList

* Write FromHttpApiData instance for Range

* Remove qualified Ids from federator API

Use separate domain and id so we don't have to parse the '@'

* Data.Qualified: Delete parser/render code for string serialization

We no longer use 'foo@bar.com' in the backend. One exception is while printing
errors for federation not implemented. Maybe this should also not use this
format.

Co-authored-by: jschaul <jschaul@users.noreply.github.com>