Gets rid of hasvar usage and moves up some vars (#18262)

* Gets rid of hasvar usage

* thiiis

* moves damtype to /obj/item

* throwing

* Move vars moved

* matter as well

Pretty much only used for the robot lathe and when crafting...When you could only smelt down obj/item for its materials

* Update floor_light.dm

* exploitable

* this can be moved up...

* move persist to /item

you can't ever place /obj in storage anyway...It would imply you can store the supermatter, which I think we don't want.

* gets rid of being_used

I added this for xenoarch, that was a mistake

* move these

* move these to the base file

* Makes floorlight autolathe recipe not shit

* Update floor_light.dm

* Update floor_light.dm

* Mechs no longer gib when hitting things

---------

Co-authored-by: Selis <12716288+ItsSelis@users.noreply.github.com>

code/game/objects/items/weapons/tools/weldingtool.dm

@@ -276,7 +276,7 @@
 				T.visible_message(span_danger("\The [src] turns on."))
 			playsound(src, acti_sound, 50, 1)
 			src.force = 15
-			src.damtype = "fire"
+			src.damtype = BURN
 			src.w_class = ITEMSIZE_LARGE
 			src.hitsound = 'sound/items/welder.ogg'
 			welding = 1
@@ -298,7 +298,7 @@
 			T.visible_message(span_warning("\The [src] turns off."))
 		playsound(src, deac_sound, 50, 1)
 		src.force = 3
-		src.damtype = "brute"
+		src.damtype = BRUTE
 		src.w_class = initial(src.w_class)
 		src.welding = 0
 		src.hitsound = initial(src.hitsound)