Mining LTSRBT oversight fix (#71714)

With the mining ltsrbt miners can invest very low amount of points to
get a free crate which they could then sell to cargo for the value the
crate has, with some automating they could get a lot of credits. This PR
prevents it by making sure the order for the mining ltsrbt delivery has
more or equal to crate value. Also increases the amount of marker beacon
miners can buy in a row from 1 to 10 to make things easier.

code/game/machinery/computer/orders/order_computer/order_computer.dm

@@ -120,6 +120,10 @@ GLOBAL_LIST_EMPTY(order_console_products)
 				return
 			if(!purchase_items(used_id_card))
 				return
+			//So miners cant spam buy crates for a very low price
+			if(get_total_cost() < CARGO_CRATE_VALUE)
+				say("For the delivery order needs to cost more or equal to [CARGO_CRATE_VALUE] points!")
+				return
 			order_groceries(living_user, used_id_card, grocery_list, ltsrbt_delivered = (action == "ltsrbt_deliver"))
 			grocery_list.Cut()
 			COOLDOWN_START(src, order_cooldown, cooldown_time)

code/game/machinery/computer/orders/order_items/mining/order_mining.dm

@@ -2,8 +2,8 @@
 	category_index = CATEGORY_MINING
 
 /datum/orderable_item/mining/marker_beacon
-	item_path = /obj/item/stack/marker_beacon
-	cost_per_order = 10
+	item_path = /obj/item/stack/marker_beacon/ten
+	cost_per_order = 100
 
 /datum/orderable_item/mining/skeleton_key
 	item_path = /obj/item/skeleton_key