cob: CLI command to list COB types
As per the discussion on zulip. A suggestion made by @Richard Levitte was to introduce a command to list COB types present in a repository.
Something like: $ rad cob types as $ rad cob list --types <TYPENAME> --repo <RID> already exists.
Having this comand would make using the $ rad cob list easier as available types would be enumerated.
I would actually prefer optional omission of
--typefromrad cob listover adding another subcommand.