Synthetic Vendor Mask Additions (#6426)

# About the pull request

Adds masks to the synthetic snowflake vendor

# Explain why it's good for the game

More synth drip is good


# Testing Photographs and Procedure
<details>
<summary>Screenshots & Videos</summary>

Put screenshots and videos here with an empty line between the
screenshots and the `<details>` tags.

</details>


# Changelog



:cl: 
add: Added masks to synth snowflake vendor
/:cl:

code/game/machinery/vending/vendor_types/crew/synthetic.dm

@@ -273,6 +273,27 @@ GLOBAL_LIST_INIT(cm_vending_clothing_synth_snowflake, list(
 	list("Corpsman Helmet", 12, /obj/item/clothing/head/helmet/marine/medic, null, VENDOR_ITEM_REGULAR),
 	list("Attachable Helmet Shield", 12, /obj/item/prop/helmetgarb/riot_shield, null, VENDOR_ITEM_REGULAR),
 
+	list("MASK", 0, null, null, null),
+	list("Surgical Mask", 12, /obj/item/clothing/mask/surgical, null, VENDOR_ITEM_REGULAR),
+	list("Rebreather", 12, /obj/item/clothing/mask/rebreather, null, VENDOR_ITEM_REGULAR),
+	list("Skull Balaclava, Blue", 12, /obj/item/clothing/mask/rebreather/skull, null, VENDOR_ITEM_REGULAR),
+	list("Skull balaclava, Black", 12, /obj/item/clothing/mask/rebreather/skull/black, null, VENDOR_ITEM_REGULAR),
+	list("Balaclava", 12, /obj/item/clothing/mask/rebreather/scarf, null, VENDOR_ITEM_REGULAR),
+	list("Balaclava (Green)", 12, /obj/item/clothing/mask/rebreather/scarf/green, null, VENDOR_ITEM_REGULAR),
+	list("Balaclava (Tan)", 12, /obj/item/clothing/mask/rebreather/scarf/tan, null, VENDOR_ITEM_REGULAR),
+	list("Balaclava (Grey)", 12, /obj/item/clothing/mask/rebreather/scarf/gray, null, VENDOR_ITEM_REGULAR),
+	list("Wrap (Grey)", 12, /obj/item/clothing/mask/rebreather/scarf/tacticalmask, null, VENDOR_ITEM_REGULAR),
+	list("Wrap (Red)", 12, /obj/item/clothing/mask/rebreather/scarf/tacticalmask/red, null, VENDOR_ITEM_REGULAR),
+	list("Wrap (Green)", 12, /obj/item/clothing/mask/rebreather/scarf/tacticalmask/green, null, VENDOR_ITEM_REGULAR),
+	list("Wrap (Tan)", 12, /obj/item/clothing/mask/rebreather/scarf/tacticalmask/tan, null, VENDOR_ITEM_REGULAR),
+	list("Wrap (Black)", 12, /obj/item/clothing/mask/rebreather/scarf/tacticalmask/black, null, VENDOR_ITEM_REGULAR),
+	list("Scarf", 12, /obj/item/clothing/mask/tornscarf, null, VENDOR_ITEM_REGULAR),
+	list("Scarf (Green)", 12, /obj/item/clothing/mask/tornscarf/green, null, VENDOR_ITEM_REGULAR),
+	list("Scarf (Snow)", 12, /obj/item/clothing/mask/tornscarf/snow, null, VENDOR_ITEM_REGULAR),
+	list("Scarf (Desert)", 12, /obj/item/clothing/mask/tornscarf/desert, null, VENDOR_ITEM_REGULAR),
+	list("Scarf (Urban)", 12, /obj/item/clothing/mask/tornscarf/urban, null, VENDOR_ITEM_REGULAR),
+	list("Scarf (Black)", 12, /obj/item/clothing/mask/tornscarf/black, null, VENDOR_ITEM_REGULAR),
+
 	list("SUIT", 0, null, null, null),
 	list("Bomber Jacket, Brown", 12, /obj/item/clothing/suit/storage/bomber, null, VENDOR_ITEM_REGULAR),
 	list("Bomber Jacket, Black", 12, /obj/item/clothing/suit/storage/bomber/alt, null, VENDOR_ITEM_REGULAR),