Christmas code changes (#41763)

* Christmas code changes

🆑 coiax
add: Santa can now examine presents to see what's inside.
del: Santa no longer has a mass summon presents spell, because of his
new regenerating bag!
add: Santa's bag regenerates presents as long as Santa is holding it.
balance: You can only find one gift under a christmas tree per round, no
matter how many trees you search.
balance: Santa's teleport does not announce where he's going.
fix: Fixed Santa not having a full head and beard of white hair.
fix: Fixed Santa not being genetically white-haired.
fix: Fixed Concentrated Barber's Aid not growing extreme amounts of
hair.
/🆑

The `box` var has been moved down from `/datum/outfit/job` to
`/datum/outfit`.

Added unlimited christmas tree with presents, for testing.

Santa's restriction against opening presents is now done by
TRAIT_CANNOT_OPEN_PRESENTS. Santa's ability to see inside presents is
done by the TRAIT_PRESENT_VISION, which also determines if Santa's Bag
will regenerate presents every 30 to 60 seconds.

Santa no longer starts with a breath mask and O2 tank, but instead has
an internals box. Santa no longer has a no-access gold ID, he can
teleport from room to room!

Gifts determine what type is inside them on initialization, rather than
when unwrapped.

- Reasoning -

Unlike last year, there are various possible methods of accessing
christmas trees spawners, allowing for an unlimited number of anything
presents. Cutting down the presents to one per round regardless of tree
count will avoid this.

Santa should be able to see what he's giving, because then he can reward
the naughty and nice children with different gifts.

* Missed a merge

* Adds present investigate logs, and visible messages

* Use the body+mind checking of mob.has_trait

* Less globals, more static vars on types; also event renaming

code/datums/components/storage/storage.dm

@@ -588,7 +588,8 @@
 				to_chat(M, "<span class='warning'>[IP] cannot hold [I] as it's a storage item of the same size!</span>")
 			return FALSE //To prevent the stacking of same sized storage items.
 	if(I.item_flags & NODROP) //SHOULD be handled in unEquip, but better safe than sorry.
-		to_chat(M, "<span class='warning'>\the [I] is stuck to your hand, you can't put it in \the [host]!</span>")
+		if(!stop_messages)
+			to_chat(M, "<span class='warning'>\the [I] is stuck to your hand, you can't put it in \the [host]!</span>")
 		return FALSE
 	var/datum/component/storage/concrete/master = master()
 	if(!istype(master))
@@ -599,7 +600,7 @@
 	return FALSE
 
 //This proc handles items being inserted. It does not perform any checks of whether an item can or can't be inserted. That's done by can_be_inserted()
-//The stop_warning parameter will stop the insertion message from being displayed. It is intended for cases where you are inserting multiple items at once,
+//The prevent_warning parameter will stop the insertion message from being displayed. It is intended for cases where you are inserting multiple items at once,
 //such as when picking up all the items on a tile with one click.
 /datum/component/storage/proc/handle_item_insertion(obj/item/I, prevent_warning = FALSE, mob/M, datum/component/storage/remote)
 	var/atom/parent = src.parent