Refactors armor into dedicated subtypes (#71986)

## About The Pull Request

See title.
## Why It's Good For The Game

Code is cleaner, and more readable/intuitive
Technically closes
https://github.com/tgstation/dev-cycles-initiative/issues/8
## Changelog
🆑
refactor: armor, from the ground up basically
/🆑

Co-authored-by: Mothblocks <35135081+Mothblocks@users.noreply.github.com>

code/game/objects/structures/fireaxe.dm

@@ -5,7 +5,7 @@
 	icon_state = "fireaxe"
 	anchored = TRUE
 	density = FALSE
-	armor = list(MELEE = 50, BULLET = 20, LASER = 0, ENERGY = 100, BOMB = 10, BIO = 0, FIRE = 90, ACID = 50)
+	armor_type = /datum/armor/structure_fireaxecabinet
 	max_integrity = 150
 	integrity_failure = 0.33
 	/// Do we need to be unlocked to be opened.
@@ -21,6 +21,14 @@
 
 MAPPING_DIRECTIONAL_HELPERS(/obj/structure/fireaxecabinet, 32)
 
+/datum/armor/structure_fireaxecabinet
+	melee = 50
+	bullet = 20
+	energy = 100
+	bomb = 10
+	fire = 90
+	acid = 50
+
 /obj/structure/fireaxecabinet/Initialize(mapload)
 	. = ..()
 	held_item = new item_path(src)