[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/game/objects/items/stacks/stack.dm

@@ -222,7 +222,7 @@
 			interact(usr)
 			return
 
-/obj/item/stack/proc/use(used, check = TRUE)
+/obj/item/stack/use(used, check = TRUE)
 	if(check && zero_amount())
 		return FALSE
 	if(amount < used)