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/modules/modular_computers/computers/item/computer.dm

@@ -11,7 +11,7 @@ GLOBAL_LIST_EMPTY(TabletMessengers) // a list of all active messengers, similar
 	light_on = FALSE
 	integrity_failure = 0.5
 	max_integrity = 100
-	armor = list(MELEE = 0, BULLET = 20, LASER = 20, ENERGY = 100, BOMB = 0, BIO = 0, FIRE = 0, ACID = 0)
+	armor_type = /datum/armor/item_modular_computer
 	light_system = MOVABLE_LIGHT_DIRECTIONAL
 
 	///The ID currently stored in the computer.
@@ -110,6 +110,11 @@ GLOBAL_LIST_EMPTY(TabletMessengers) // a list of all active messengers, similar
 	///The max amount of paper that can be held at once.
 	var/max_paper = 30
 
+/datum/armor/item_modular_computer
+	bullet = 20
+	laser = 20
+	energy = 100
+
 /obj/item/modular_computer/Initialize(mapload)
 	. = ..()