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/modules/custom_ka/core.dm

@@ -398,7 +398,7 @@
 		custom_name = sanitize(input("Enter a custom name for your [name]", "Set Name") as text|null)
 		to_chat(user,"You label \the [name] as \"[custom_name]\"")
 		update_icon()
-	else if(istype(I,/obj/item/weapon/wrench))
+	else if(I.iswrench())
 		if(installed_upgrade_chip)
 			playsound(src,I.usesound, 50, 0)
 			to_chat(user,"You remove \the [installed_upgrade_chip].")