Mining robot module upgrade

- Mining cyborgs can now properly work with drills.
- Mining cyborgs have received ore scanner, crowbar, and limited version of magnetic gripper.
- Mining cyborgs can now swap power cells inside mining drills, as well as upgrade them if provided better parts.
- As a bonus, cyborgs can now see how much ore is in ore boxes (because it makes sense that cyborg which mined ton of ore can check how much ore it mined)

code/game/machinery/cell_charger.dm

@@ -79,7 +79,16 @@
 		updateicon()
 
 /obj/machinery/cell_charger/attack_ai(mob/user)
-	return
+	if(istype(user, /mob/living/silicon/robot) && Adjacent(user)) // Borgs can remove the cell if they are near enough
+		if(!src.charging)
+			return
+
+		charging.loc = src.loc
+		charging.updateicon()
+		charging = null
+		update_icon()
+		user.visible_message("[user] removes the cell from the charger.", "You remove the cell from the charger.")
+
 
 /obj/machinery/cell_charger/emp_act(severity)
 	if(stat & (BROKEN|NOPOWER))

code/modules/mining/satchel_ore_boxdm.dm

@@ -40,7 +40,8 @@
 	user << "That's an [src]."
 	user << desc
 
-	if(!istype(user, /mob/living/carbon/human)) //Only living, intelligent creatures with hands can check the contents of ore boxes.
+	// Borgs can now check contents too.
+	if((!istype(user, /mob/living/carbon/human)) && (!istype(user, /mob/living/silicon/robot)))
 		return
 
 	if(!Adjacent(user)) //Can only check the contents of ore boxes if you can physically reach them.

code/modules/mob/living/silicon/robot/drone/drone_items.dm

@@ -29,6 +29,13 @@
 	//Item currently being held.
 	var/obj/item/wrapped = null
 
+// VEEEEERY limited version for mining borgs. Basically only for swapping cells and upgrading the drills.
+/obj/item/weapon/gripper/miner
+	can_hold = list(
+	/obj/item/weapon/cell,
+	/obj/item/weapon/stock_parts
+	)
+
 /obj/item/weapon/gripper/paperwork
 	name = "paperwork gripper"
 	desc = "A simple grasping tool for clerical work."

code/modules/mob/living/silicon/robot/robot_modules.dm

@@ -367,6 +367,9 @@
 		src.modules += new /obj/item/weapon/storage/bag/ore(src)
 		src.modules += new /obj/item/weapon/pickaxe/borgdrill(src)
 		src.modules += new /obj/item/weapon/storage/bag/sheetsnatcher/borg(src)
+		src.modules += new /obj/item/weapon/gripper/miner(src)
+		src.modules += new /obj/item/weapon/mining_scanner(src)
+		src.modules += new /obj/item/weapon/crowbar(src)
 		src.emag = new /obj/item/weapon/pickaxe/plasmacutter(src)
 		return