Fixes high power consumption for lathes (#81375)

## About The Pull Request
This employs a formula that creates a relationship between total stacks
of material used & the machines active power consumption

- When inserting/ejecting a full stack of materials, lathes use 1% of
the machine active power usage. To put it in player terms if your apc
has a normal high capacity power cell it will use 2% of power when
inserting a full stack(50 sheets) of material or when ejecting a full
stack of materials

- Fixes #81366. When printing multiple items that would require a full
stack of materials (50 sheets or roughly 5000 matter units) It now uses
5% of the machine active power usage. To see the comparision we will see
the same examples used in the issue

    **Old Behaviour**
- Printing 10 large beakers for tier 1 lathe would consume 48% of apc
cell
- Printing 1 circular saw for tier 1 lathe would consume 32% of apc cell
    
    **New Behaviour**
- Printing 10 large beakers for tier 1 lathe now consumes just 5% of apc
cell
- Printing 1 circular saw for tier 1 lathe now consumes just 1% of apc
cell
- Higher tier parts will consume more power to compensate for the lower
material costs because the machines active power usage increases with
higher tier parts, assuming your apc has a normal high capacity power
cell
- Printing 10 large beakers for tier 4 lathe now consumes 12% of apc
cell
- Printing 1 circular saw for tier 4 lathe now consumes 5% of apc cell
      
This formula is experimental and i just made it up so let's see how this
plays out

## Changelog
🆑
fix: lathes now use moderate power for printing operations
/🆑

code/game/machinery/autolathe.dm

@@ -97,7 +97,8 @@
 
 	flick("autolathe_[item_inserted.has_material_type(/datum/material/glass) ? "r" : "o"]", src)
 
-	directly_use_power(round((amount_inserted / SHEET_MATERIAL_AMOUNT) * active_power_usage * 0.0025))
+	//we use initial(active_power_usage) because higher tier parts will have higher active usage but we have no benifit from it
+	directly_use_power(ROUND_UP((amount_inserted / (MAX_STACK_SIZE * SHEET_MATERIAL_AMOUNT)) * 0.01 * initial(active_power_usage)))
 
 /obj/machinery/autolathe/ui_interact(mob/user, datum/tgui/ui)
 	if(!is_operational)
@@ -273,7 +274,7 @@
 	var/charge_per_item = 0
 	for(var/material in design.materials)
 		charge_per_item += design.materials[material]
-	charge_per_item = min(active_power_usage, round(charge_per_item * material_cost_coefficient))
+	charge_per_item = ROUND_UP((charge_per_item / (MAX_STACK_SIZE * SHEET_MATERIAL_AMOUNT)) * material_cost_coefficient * 0.05 * active_power_usage)
 	var/build_time_per_item = (design.construction_time * design.lathe_time_factor) ** 0.8
 
 	//do the printing sequentially