More Vox Sprites - The Frontiersmen (shiptest-ss13#3282)

## About The Pull Request

Adds general sprites to the Frontiersmen for the Vox.

Your average grunts...

![image](https://github.com/user-attachments/assets/356fd77a-985b-440a-959c-0e5554b93179)
Frontiersman uniform, sans armor

![image](https://github.com/user-attachments/assets/f4a54036-4dda-4367-9789-d038283ea30d)
Deckhands!

![image](https://github.com/user-attachments/assets/ca8a396f-3b7f-41eb-80f7-9142774f650a)
Vessel Command

![image](https://github.com/user-attachments/assets/6e912531-c3fe-4aae-85a0-f18d8b8cc48e)
Fleet Command

![image](https://github.com/user-attachments/assets/8f2c8bb4-09b7-422d-b8ac-0c3a586f74bc)


## Why It's Good For The Game

The faction rooted in Vox history finally has sprites to represent the
Vox themselves. That's pretty cool I think.

## Changelog

:cl: Cloudbreak
add: Frontiersman sprites for the Vox!
/:cl:

code/modules/clothing/factions/frontiersmen.dm

@@ -10,6 +10,7 @@
 	can_adjust = FALSE
 	icon = 'icons/obj/clothing/faction/frontiersmen/uniforms.dmi'
 	mob_overlay_icon = 'icons/mob/clothing/faction/frontiersmen/uniforms.dmi'
+	supports_variations = VOX_VARIATION
 
 /obj/item/clothing/under/frontiersmen/deckhand
 	name = "\improper deckhand jumpsuit"
@@ -58,6 +59,7 @@
 	icon = 'icons/obj/clothing/faction/frontiersmen/suits.dmi'
 	mob_overlay_icon = 'icons/mob/clothing/faction/frontiersmen/suits.dmi'
 	blood_overlay_type = "armor"
+	supports_variations = VOX_VARIATION
 
 /obj/item/clothing/suit/armor/vest/marine/frontier
 	name = "light tactical armor vest"
@@ -162,17 +164,20 @@
 	name = "\improper frontiersmen commander's cap"
 	desc = "An imposing peaked cap, meant for a commander of the Frontiersmen."
 	icon_state = "frontier_cap"
+	supports_variations = VOX_VARIATION
 
 /obj/item/clothing/head/frontier/admiral
 	name = "\improper frontiersmen admiral's cap"
 	desc = "An imposing peaked cap meant for only the highest of officers of the Frontiersmen pirate fleet."
 	icon_state = "frontier_admiral_cap"
+	supports_variations = VOX_VARIATION
 
 /obj/item/clothing/head/helmet/bulletproof/x11/frontier
 	name = "\improper frontiersmen X-11 helmet"
 	desc = "A heavily modified X-11 pattern helmet used by the Frontiersmen pirate fleet."
 	icon_state = "x11helm_frontier"
 	unique_reskin = null
+	supports_variations = VOX_VARIATION
 
 /obj/item/clothing/head/helmet/bulletproof/x11/frontier/fireproof
 	name = "\improper fireproof frontiersmen X-11 helmet"