[feature request] Hex nut hexagonal cutouts

[Jordan Poles]

Is there a way to generate hexagonal cutouts/countersink holes for hex nuts? As far as I can tell, the default behavior is to generate a square hole, which works but in my experience has higher risk of "stripping out" and having the nut end up free spinning. When oriented vertically in a 3d print, I also believe a hex cutout is also easier for a printer than a square cutout (unless square cutout is rotated 45 degrees I suppose).

Thanks for the great library!