Add the design files for the librem5-devkit printable case.
The original design was by MrPickle https://www.youmagine.com/designs/librem5-devkit-case Openscad adaptation by Angus Ainslie <angus.ainslie@puri.sm>
The original design was by MrPickle https://www.youmagine.com/designs/librem5-devkit-case Openscad adaptation by Angus Ainslie <angus.ainslie@puri.sm>