Killing off inconsistencies with impact wrenches / combi-tools (#7269)

Part 1 in the "why my impact wrench no wrench bolt" saga

tl;dr for end users: combitools / impact wrenches now work on everything their non-powered versions do (except mechs and RIGs, tune in next time on dragon ball Z for that)

essentially all this PR does is murder every istype() check possible that could use a helper function instead, most notably many pen checks with ispen(). it also repaths combitools and powerdrills to /obj/item/weapon so they aren't instantly taken out of contention by half of the known attackby() prompts

I already squashed a couple runtimes here and there from the pen changes and it's possible I missed another because pencode is another scourge upon our lives

code/game/objects/items/stacks/sheets/glass.dm

@@ -132,7 +132,7 @@
 		else
 			to_chat(user, "<span class='warning'>You need one metal sheet to finish the light tile!</span>")
 
-	else if(istype(O, /obj/item/weapon/wirecutters))
+	else if(O.iswirecutter())
 		user.drop_from_inventory(O,get_turf(src))
 		to_chat(user, "<span class='notice'>You detach the wire from the [name].</span>")
 		playsound(src.loc, 'sound/items/Wirecutter.ogg', 100, 1)

code/game/objects/items/stacks/tiles/light.dm

@@ -18,7 +18,7 @@
 		state = 0 //fine
 
 /obj/item/stack/tile/light/attackby(var/obj/item/O, var/mob/user)
-	if(istype(O, /obj/item/weapon/crowbar))
+	if(O.iscrowbar())
 		amount--
 		to_chat(user, "<span class='notice'>You pry off the steel sheet from the [name].</span>")
 		playsound(src.loc, 'sound/items/Crowbar.ogg', 100, 1)