SMOLBOAT case for ortholinear keyboards

This is a case for ortholinear keyboards, the design is inspired on the Canoe by Percent Studios.

For now it supports the following keyboard PCBs: Planck, Preonic, JJ40, JJ50, XD75, Ortho60, Boardwalk, Big Dill Extended rev2, Slanck and Vault35 Ortho.

For some keyboards I made multiple versions for different layouts : 1x2u, 2x2u, grid layout, and one that I called compat wich support the 3 previous layouts.

For the XD75 there is two versions : one where the design of the case is unchanged compared to the other keyboards, but the long side measures 305.75 mm so I made another one where I reduced the bezels to make the long side 300 mm.