Adds storage to helmets, which can overlay certain items in them (#2845)

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## About The Pull Request

![imagen](https://github.com/shiptest-ss13/Shiptest/assets/75212565/cc1a9bfc-5f6a-4091-8ea5-695c5b1e1ca7)
Adds a whitelisted storage component to helmets, and a variable that
determines if they should process overlays. Features codersprites.

![imagen](https://github.com/shiptest-ss13/Shiptest/assets/75212565/8e874d88-885b-4909-9f5d-81be1ae4f5ae)


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## Why It's Good For The Game
  * It looks nice.

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## Changelog

:cl:
add: Helmets now have a small, two-item storage. You can put goggles in
there, and it might overlay them.
/:cl:

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code/datums/components/storage/concrete/pockets.dm

@@ -83,10 +83,16 @@
 /datum/component/storage/concrete/pockets/helmet/Initialize()
 	. = ..()
 	set_holdable(list(
-		/obj/item/reagent_containers/food/drinks/bottle/vodka,
-		/obj/item/reagent_containers/food/drinks/bottle/molotov,
-		/obj/item/reagent_containers/food/drinks/drinkingglass,
-		/obj/item/ammo_box/magazine/illestren_a850r
+		/obj/item/clothing/glasses/cold,
+		/obj/item/clothing/glasses/heat,
+		/obj/item/clothing/glasses/welding,
+		/obj/item/clothing/glasses/thermal,
+		/obj/item/clothing/glasses/night,
+		/obj/item/clothing/glasses/hud/health/night,
+		/obj/item/clothing/glasses/hud/security/night,
+		/obj/item/clothing/glasses/hud/security/sunglasses/inteq,
+		/obj/item/ammo_casing,
+		/obj/item/ammo_box/magazine/illestren_a850r,
 	))
 
 /datum/component/storage/concrete/pockets/holster

code/game/objects/items.dm

@@ -699,6 +699,9 @@ GLOBAL_VAR_INIT(embedpocalypse, FALSE) // if true, all items will be able to emb
 /obj/item/proc/get_belt_overlay() //Returns the icon used for overlaying the object on a belt
 	return mutable_appearance('icons/obj/clothing/belt_overlays.dmi', icon_state)
 
+/obj/item/proc/get_helmet_overlay() // returns the icon for overlaying on a helmet
+	return mutable_appearance('icons/mob/clothing/helmet_overlays.dmi', icon_state)
+
 /obj/item/proc/update_slot_icon()
 	if(!ismob(loc))
 		return

code/modules/clothing/head/helmet.dm

@@ -16,10 +16,15 @@
 
 	dog_fashion = /datum/dog_fashion/head/helmet
 
-	var/can_flashlight = FALSE //if a flashlight can be mounted. if it has a flashlight and this is false, it is permanently attached.
+	//if a flashlight can be mounted. if it has a flashlight and this is false, it is permanently attached.
+	var/can_flashlight = FALSE
 	var/obj/item/flashlight/seclite/attached_light
 	var/datum/action/item_action/toggle_helmet_flashlight/action_light
 
+	pocket_storage_component_path = /datum/component/storage/concrete/pockets/helmet
+	// should we overlay the items inside our helmet
+	var/content_overlays = FALSE
+
 /obj/item/clothing/head/helmet/Initialize()
 	. = ..()
 	if(attached_light)
@@ -171,16 +176,21 @@
 	var/mutable_appearance/flashlightlight_overlay
 	if(isinhands)
 		return
-	if(!attached_light)
-		return
-	if(attached_light.on)
-		flashlightlight_overlay = mutable_appearance('icons/mob/clothing/head.dmi', "[flashlight_state]_on")
+	if(attached_light)
+		if(attached_light.on)
+			flashlightlight_overlay = mutable_appearance('icons/mob/clothing/head.dmi', "[flashlight_state]_on")
+		else
+			flashlightlight_overlay = mutable_appearance('icons/mob/clothing/head.dmi', flashlight_state)
+		. += flashlightlight_overlay
+	if(content_overlays)
+		for(var/obj/item/I in contents)
+			. += I.get_helmet_overlay()
 	else
-		flashlightlight_overlay = mutable_appearance('icons/mob/clothing/head.dmi', flashlight_state)
-	. += flashlightlight_overlay
+		return
 
 /obj/item/clothing/head/helmet/sec
 	can_flashlight = TRUE
+	content_overlays = TRUE
 
 /obj/item/clothing/head/helmet/sec/attackby(obj/item/I, mob/user, params)
 	if(issignaler(I))
@@ -214,6 +224,7 @@
 		"Snow" = "helmetalt_snow",
 		"Urban" = "helmetalt_urban",
 		)
+	content_overlays = TRUE
 
 /obj/item/clothing/head/helmet/marine
 	name = "tactical combat helmet"
@@ -497,13 +508,15 @@
 	icon_state = "inteq_swat"
 	item_state = "inteq_swat"
 	flags_inv = HIDEHAIR
+	content_overlays = TRUE
 
 /obj/item/clothing/head/helmet/inteq
 	name = "inteq helmet"
 	desc = "A standard issue helmet in the colors of the IRMG. It doesn't feel special in any way."
 	icon_state = "inteq_helmet"
 	icon_state = "inteq_helmet"
 	can_flashlight = TRUE
+	content_overlays = TRUE
 
 /obj/item/clothing/head/solgov
 	name = "\improper SolGov officer's cap"
@@ -545,6 +558,7 @@
 	desc = "A robust combat helmet commonly employed by Syndicate forces, regardless of alignment."
 	icon_state = "operator"
 	item_state = "operator"
+	content_overlays = TRUE
 
 /obj/item/clothing/head/helmet/medical
 	name = "\improper trauma team helmet"

code/modules/clothing/spacesuits/_spacesuits.dm

@@ -19,6 +19,8 @@
 	flags_cover = HEADCOVERSEYES | HEADCOVERSMOUTH | PEPPERPROOF
 	resistance_flags = NONE
 	dog_fashion = null
+	content_overlays = FALSE
+	pocket_storage_component_path = null
 
 /obj/item/clothing/suit/space
 	name = "space suit"