Adds the Europan beanie (#20126)

This adds the submariner's beanie to the game and loadout, a piece of
warm headwear particularly common to Europa. Sprited by and at request
of Noble Row.


![image](https://github.com/user-attachments/assets/a64948f8-04a9-40ab-86fe-3c0fd6076381)

code/modules/client/preference_setup/loadout/items/head.dm

@@ -340,6 +340,11 @@
 	path = /obj/item/clothing/head/beanie/winter
 	flags = GEAR_HAS_NAME_SELECTION | GEAR_HAS_DESC_SELECTION | GEAR_HAS_COLOR_SELECTION | GEAR_HAS_ACCENT_COLOR_SELECTION
 
+/datum/gear/head/submariner_beanie
+	display_name = "submariner beanie"
+	path = /obj/item/clothing/head/beanie/submariner
+	flags = GEAR_HAS_NAME_SELECTION | GEAR_HAS_DESC_SELECTION | GEAR_HAS_COLOR_SELECTION
+
 /datum/gear/head/nonla
 	display_name = "non la hat"
 	path = /obj/item/clothing/head/nonla

code/modules/clothing/head/winter_hats.dm

@@ -55,3 +55,9 @@
 	icon_state = "winterbeanie"
 	item_state = "winterbeanie"
 	has_accents = TRUE
+
+/obj/item/clothing/head/beanie/submariner
+	name = "submariner's beanie"
+	desc = "A design of tightly fitting beanie particularly popular among the dock workers of Europa. Favored among anyone who prides a warm head."
+	icon_state = "dock_beanie"
+	item_state = "dock_beanie"