Armour Refactor (#18547)

* initial commit

* bullet fix + 100% armour pen

* equivalent armour values

* percentage armour pen

* updates bombing

* adds more defines

* i like armour too much

* review pass 1

* review pass 2

* updates with lavaland elites

* armour penetration value tweaks

* wt550 AP round change

code/modules/paperwork/pen.dm

@@ -140,7 +140,7 @@
 	var/on = FALSE
 	var/brightness_on = 2
 	light_color = LIGHT_COLOR_RED
-	armour_penetration = 20
+	armour_penetration_flat = 20
 
 /obj/item/pen/edagger/attack_self(mob/living/user)
 	if(on)