SKADIS / SKÅDIS hanger for Dewalt 8V Screwdriver and Batteries

A simple remix of @barty3d's original Dewalt 8V screwdriver and battery holder, adding a set of SKÅDIS-compatible hooks to the back. I've added both a four- and three-hook variant, which will affect how slots are blocked on the board and how you need to generate supports. (And now I'm going to go off and be sad that Dewalt never made any other 8V tools besides the screwdriver variations and the flashlight. Such a great footprint for small electric tools…)