McConnell Room 12

feat: purge of pictures in verification channel (periodic or through command) (@le-potate)
feat: ?spoilerize command to repost messages as spoilers through a webhook with the same username and avatar as the original author. Mods can use this on any users (@le-potate)
feat: new muting system (can be used through ?mute and ?unmute commands or by directly giving a role) that saves and remove all roles from the user and creates an appeal channel reserved to them. When they are unmuted, they get their roles back (after confirmation) and the appeal channel is deleted. All messages in appeals channels are logged in a central channel (@le-potate and @davidlougheed)
chore: update dependencies and dockerfile