Restore power cell sprite to "V2" and add cells to protolathe

-Restored power cell sprites to the "V2" sprites as I called them.
-Disabled base and virgo power cell/device/power_cell_research files and moved them into chomp modularity folder instead.

Added to the protolathe (I hope because I forgot to last time):
-Giga device cells
-Giga large cells
-Rechargeable weapon cell
-EMP-proof device cell
-EMP-proof weapon device cell
-Potato device cell


All the giga and recharging cells will require precursor tech 1.

code/modules/research/designs/power_cells.dm

@@ -1,3 +1,4 @@
+//CHOMP Disabled in DME in favor of modular_chomp folder
 /datum/design/item/powercell
 	build_type = PROTOLATHE | MECHFAB