Equip snakes (#21302)

Snakes can now be picked up and held, as well as equipped in your LEFT
EAR or RIGHT EAR slot.

Added the necessary sprites for holding/equipping snakes.

code/modules/mob/holder.dm

@@ -651,3 +651,12 @@
 	hitsound = 'sound/effects/snap.ogg'
 	force = 14//quite large fishey
 	throwforce = 6
+
+//Holder for snakes
+/obj/item/holder/snake
+	name = "snake"
+	icon = 'icons/mob/npc/animal.dmi'
+	icon_state = "snake_rest"
+	item_state = "snake"
+	w_class = WEIGHT_CLASS_NORMAL
+	slot_flags = SLOT_EARS

code/modules/mob/living/simple_animal/friendly/snake.dm

@@ -13,6 +13,8 @@
 	response_help  = "pets"
 	response_disarm = "boops"
 	response_harm   = "stomps on"
-	mob_size = MOB_SMALL
+	mob_size = 3.5
+	can_nap = TRUE
 	canbrush = TRUE
 	brush = /obj/item/reagent_containers/glass/rag
+	holder_type = /obj/item/holder/snake