Pro Micro 3d shape is missing.

[HarrierPigeon]

3D shape name refers to location ``/Users/danny/Documents/proj/custom-keyboard/kicad-libs/3d_modules/…``` instead of a location inside of a keebio library.

[nooges]

This is a bit tricky to handle, as relative folder references are done with respect to the PCB project folder, as opposed to the folder of the library, so not really an easy fix here.