Adds the "Jestographic Sequencer", a clown-exclusive traitor item (#18933)

* Initial commit

* Removes ability for AI/door remotes to interface with cmagged doors

* Adds cleaning method, fixes windoor functionality, makes cmag slippery

* Cleaning cmagged doors checks for remaining space cleaner, cleanup

* Reduced TC cost from 6 to 4, fixed small bug

* Code review super happy funtime

* Adds cooldown to cmag airlock chuckle

* Cleanup, cmag door laugh no longer sounds through walls (again)

* Prevents blank spare IDs from passing through cmagged airlocks

* Cleanup

* Cmagged state is now carried by a trait instead of a global var, cleanup

* Adds early return that I missed, fixes small bug)

code/game/objects/items/weapons/cards_ids.dm

@@ -80,6 +80,27 @@
 		return
 	A.emag_act(user)
 
+/obj/item/card/cmag
+	desc = "It's a card coated in a slurry of electromagnetic bananium."
+	name = "jestographic sequencer"
+	icon_state = "cmag"
+	item_state = "card-id"
+	origin_tech = "magnets=2;syndicate=2"
+	flags = NOBLUDGEON
+	flags_2 = NO_MAT_REDEMPTION_2
+
+/obj/item/card/cmag/Initialize(mapload)
+	. = ..()
+	AddComponent(/datum/component/slippery, src, 16 SECONDS, 100)
+
+/obj/item/card/cmag/attack()
+	return
+
+/obj/item/card/cmag/afterattack(atom/target, mob/user, proximity)
+	if(!proximity)
+		return
+	target.cmag_act(user)
+
 /obj/item/card/id
 	name = "identification card"
 	desc = "A card used to provide ID and determine access across the station."