* allow admins deleting groups from directory and registering groups with same name as deleted one; /help commands
* support profile changes by other owners, with/without connection to directory
* profile check will succeed when group link encoding or versions change, but the link queues remain the same
* update message text when forwarding and quoting to reflect changes in mentioned member names
* fix, test
* forward mentions to the same chat, refactor
* comment
* tests
* test markdown conversion to text
* simplify
* unused
* comments
* core: member mentions, types and rfc
* update
* update rfc
* save/get mentions (WIP)
* markdown
* store received mentions and userMention flag
* sent mentions
* update message with mentions
* db queries
* CLI mentions, test passes
* use maps for mentions
* tests
* comment
* save mentions on sent messages
* postresql schema
* refactor
* M.empty
* include both displayName and localAlias into MentionedMemberInfo
* fix saving sent mentions
* include mentions in previews
* update plans