fix: Improved guild config cleanup migration by removing invalid Permissiosnv2 entries (thx Leon)

add: Added options '-c' option for '.xpglb' which will show global xp leaderboard only with this server's users

fix: .greetmsg (and related commands) and .greettest (and other greet test commands) will now show the correct response string when the toggle is disabled

dev: Cleaned up some comments, changed grpc api

fix: author name will be counted as content in embeds. Embeds will now be valid if they only have an author specified

api: Added warn endpoints
fix: Reminders should now be able to ping everyone if the user who created the reminder has that permission