Converts pre-rework generic heretic gear into chaplain clothing and a null rod (#94363)

## About The Pull Request

Reused the old pre-rework heretic robe and blade assets as a new set of
chaplain gear and null rod option.

Replaced the last few existing uses of the now spriteless generic robe:
- Deathmatch, changed heretic warrior to use blade robes
- Deathmatch, changed ripper to use the new chaplain armour
- Tribal mothman legion corpse, changed to use new chaplain armour
- Heretic preview and hallucination, changed to use rust robes
- Heretic virtual domain, changed to use rust robes

<img width="127" height="131" alt="image"
src="https://github.com/user-attachments/assets/690e848e-5191-44d4-bd58-5e338fa2aa4e"
/>

## Why It's Good For The Game

Chaplains are the playground of old magic content assets, where they
find a second life as cosplay outfits. Chaplains can already cosplay
cultists, it's only fair that they can pretend to be a heretic as well.

## Changelog
🆑
add: Added a new set of chaplain armour based on the generic heretic
robes unavailable since the path rework.
/🆑

code/game/objects/items/storage/boxes/clothes_boxes.dm

@@ -232,6 +232,14 @@
 	new /obj/item/clothing/gloves/divine_archer(src)
 	new /obj/item/clothing/shoes/divine_archer(src)
 
+/obj/item/storage/box/holy/heretic
+	name = "Occult Practitioner Kit"
+	typepath_for_preview = /obj/item/clothing/suit/chaplainsuit/armor/heretic
+
+/obj/item/storage/box/holy/heretic/PopulateContents()
+	new /obj/item/clothing/suit/chaplainsuit/armor/heretic(src)
+	new /obj/item/clothing/head/helmet/chaplain/heretic(src)
+
 /obj/item/storage/box/floor_camo
 	name = "floor tile camo box"
 	desc = "Thank you for shopping from Camo-J's, our uniquely designed \