Ports Diesel Boots from F13 (#3767)

## About The Pull Request
SPRITES BY FLUFF FROM BAD DEATHCLAW | DIGITIGRADE SPRITES BY ME (XPOKEE)

IMAGES!!
<details>
<summary>GHOUL WARNING</summary>


![image](https://github.com/user-attachments/assets/11114b6c-7751-4390-aea2-497bbbca2a99)

</details>

<details>
<summary>DIGI BOOTS</summary>


![image](https://github.com/user-attachments/assets/1123b69b-5396-4587-9ee1-d63f397cf9c9)


![image](https://github.com/user-attachments/assets/4ecdb719-2b3b-498c-ad52-7259119bb0e0)


</details>

## Why It's Good For The Game
They look pretty nice, plus they allow for more customization. 
## Proof Of Testing
See above.

## Changelog
🆑
add: Ported the male/female diesel boots from F13
/🆑

---------

Co-authored-by: Roxy <75404941+TealSeer@users.noreply.github.com>

modular_zubbers/code/modules/clothing/shoes/boots.dm

@@ -283,3 +283,20 @@
 	body_parts_covered = parent_type::body_parts_covered | LEGS
 	resistance_flags = FIRE_PROOF
 	fastening_type = SHOES_SLIPON
+
+// Diesel Boots | Sprites by Fluff from Bad Deathclaw
+/obj/item/clothing/shoes/jackboots/diesel_m
+	name = "male diesel boots"
+	desc = "Fancy mens' steel-toed boots."
+	icon = 'modular_zubbers/icons/obj/clothing/feet/feet.dmi'
+	worn_icon = 'modular_zubbers/icons/mob/clothing/feet/feet.dmi'
+	worn_icon_digi = 'modular_zubbers/icons/mob/clothing/feet/feet_digi.dmi'
+	icon_state = "diesel_m"
+
+/obj/item/clothing/shoes/jackboots/diesel_f
+	name = "female diesel boots"
+	desc = "Fancy womens' knee-high platform boots with shiny steel clasps."
+	icon = 'modular_zubbers/icons/obj/clothing/feet/feet.dmi'
+	worn_icon = 'modular_zubbers/icons/mob/clothing/feet/feet.dmi'
+	worn_icon_digi = 'modular_zubbers/icons/mob/clothing/feet/feet_digi.dmi'
+	icon_state = "diesel_f"

modular_zubbers/code/modules/loadout/categories/shoes.dm

@@ -27,3 +27,11 @@
 /datum/loadout_item/shoes/horseshoes
 	name = "Horseshoes"
 	item_path = /obj/item/clothing/shoes/horseshoe
+
+/datum/loadout_item/shoes/diesel_m
+	name = "Male Diesel Boots"
+	item_path = /obj/item/clothing/shoes/jackboots/diesel_m
+
+/datum/loadout_item/shoes/diesel_f
+	name = "Female Diesel Boots"
+	item_path = /obj/item/clothing/shoes/jackboots/diesel_f