Enables AI Multicam in Config and Adds an Admin Verb (#8030)

* enables AI multicam in config options and gives it a button

* prevents AI players from getting stuck in multicam if turned off mid-multicam

code/modules/admin/admin_verbs.dm

@@ -118,6 +118,7 @@ GLOBAL_LIST_INIT(admin_verbs_server, world.AVerbsServer())
 	/datum/admins/proc/toggleaban,
 	/client/proc/everyone_random,
 	/datum/admins/proc/toggleAI,
+	/datum/admins/proc/toggleMulticam,
 	/client/proc/cmd_admin_delete,		/*delete an instance/object/mob/etc*/
 	/client/proc/cmd_debug_del_all,
 	/client/proc/toggle_random_events,