[Testmerge ready] Ports tool behaviours; refactors all tools; adds functionality for self-filling reagent containers (#11700)

* Adds support for self-filling reagent containers

* Sets tool_behaviour on the default set of tools

* Fixing merge conflicts

* Refactors welder to use tool behaviour

* The refactor: part I

* The refactor: part II

* Tool Refactor Part III: Revenge of the Maint

* Tool Refactor Part IV: A New Hope

* Tool Refactor Part V: The Oldcoder Strikes Back

* Tool Refactor Part VI: Return of the Coder

* VII

* Holy shit, it compiles?!

* Nannek I completed your TODO, you owe me ice cream

* Tool helpers; telepad is compliant

* Bugtest, Round 1: Fight

Fuck refactoring disposals

* Buggfixing, Round 2: Electric Boogaloo

* Personal crafting uses tool behaviours now

* Construction datums use new tool behaviours; better way of handling fueltank refuelling; more bugfixing

* multitool_check_buffer change; removes some useless things in tool_helpers

* proc name change

* TRUE/FALSE changes

* Bugfixing, Round 3: A Good Day To Bugfix Hard

Fixes multiple issues raised by the testmerge

* Minor style changes

code/modules/projectiles/gun.dm

@@ -301,21 +301,6 @@
 				if(loc == user)
 					A.Grant(user)
 
-	if(isscrewdriver(I))
-		if(gun_light && can_flashlight)
-			for(var/obj/item/flashlight/seclite/S in src)
-				to_chat(user, "<span class='notice'>You unscrew the seclite from [src].</span>")
-				gun_light = null
-				S.loc = get_turf(user)
-				update_gun_light(user)
-				S.update_brightness(user)
-				update_icon()
-				for(var/datum/action/item_action/toggle_gunlight/TGL in actions)
-					qdel(TGL)
-		else if(bayonet && can_bayonet) //if it has a bayonet, and the bayonet can be removed
-			bayonet.forceMove(get_turf(user))
-			clear_bayonet()
-
 	if(unique_rename)
 		if(istype(I, /obj/item/pen))
 			rename_gun(user)
@@ -339,6 +324,24 @@
 	else
 		return ..()
 
+/obj/item/gun/screwdriver_act(mob/user, obj/item/I)
+	. = TRUE
+	if(!I.use_tool(src, user, 0, volume = I.tool_volume))
+		return
+	if(gun_light && can_flashlight)
+		for(var/obj/item/flashlight/seclite/S in src)
+			to_chat(user, "<span class='notice'>You unscrew the seclite from [src].</span>")
+			gun_light = null
+			S.loc = get_turf(user)
+			update_gun_light(user)
+			S.update_brightness(user)
+			update_icon()
+			for(var/datum/action/item_action/toggle_gunlight/TGL in actions)
+				qdel(TGL)
+	else if(bayonet && can_bayonet) //if it has a bayonet, and the bayonet can be removed
+		bayonet.forceMove(get_turf(user))
+		clear_bayonet()
+
 /obj/item/gun/proc/toggle_gunlight()
 	set name = "Toggle Gun Light"
 	set category = "Object"

code/modules/projectiles/guns/energy/kinetic_accelerator.dm

@@ -37,20 +37,23 @@
 				. += "<span class='notice'>There is a [M.name] mod installed, using <b>[M.cost]%</b> capacity.</span>"
 
 /obj/item/gun/energy/kinetic_accelerator/attackby(obj/item/I, mob/user)
-	if(iscrowbar(I))
-		if(modkits.len)
-			to_chat(user, "<span class='notice'>You pry the modifications out.</span>")
-			playsound(loc, I.usesound, 100, 1)
-			for(var/obj/item/borg/upgrade/modkit/M in modkits)
-				M.uninstall(src)
-		else
-			to_chat(user, "<span class='notice'>There are no modifications currently installed.</span>")
-	else if(istype(I, /obj/item/borg/upgrade/modkit))
+	if(istype(I, /obj/item/borg/upgrade/modkit))
 		var/obj/item/borg/upgrade/modkit/MK = I
 		MK.install(src, user)
 	else
 		return ..()
 
+/obj/item/gun/energy/kinetic_accelerator/crowbar_act(mob/user, obj/item/I)
+	. = TRUE
+	if(!modkits.len)
+		to_chat(user, "<span class='notice'>There are no modifications currently installed.</span>")
+		return
+	if(!I.use_tool(src, user, 0, volume = I.tool_volume))
+		return
+	to_chat(user, "<span class='notice'>You pry the modifications out.</span>")
+	for(var/obj/item/borg/upgrade/modkit/M in modkits)
+		M.uninstall(src)
+
 /obj/item/gun/energy/kinetic_accelerator/proc/get_remaining_mod_capacity()
 	var/current_capacity_used = 0
 	for(var/A in get_modkits())