Removes a great amount of machinery copypasta with circuitboards.

Also changes New -> Initialize in most of them.
renamed: `code/game/machinery/computer/computer.dm` -> `code/game/machinery/computer/_computer.dm`
renamed: `code/game/machinery/machinery.dm` -> `code/game/machinery/_machinery.dm`
Moved all circuitboards to a new folder at `code/game/objects/items/weapons/circuitboards`

code/modules/mining/mint.dm

@@ -15,18 +15,16 @@
 	speed_process = 1
 
 
-/obj/machinery/mineral/mint/New()
-	..()
+/obj/machinery/mineral/mint/Initialize()
+	. = ..()
 	materials = new /datum/material_container(src,
 		list(MAT_METAL, MAT_PLASMA, MAT_SILVER, MAT_GOLD, MAT_URANIUM, MAT_DIAMOND, MAT_BANANIUM),
 		max_amt = MINERAL_MATERIAL_AMOUNT*50)
 
 /obj/machinery/mineral/mint/Destroy()
-	qdel(materials)
-	materials = null
+	QDEL_NULL(materials)
 	return ..()
 
-
 /obj/machinery/mineral/mint/process()
 	var/turf/T = get_step(src, input_dir)
 	if(!T)