* Initial implementation of REVIUNG34 shield.
* Add copyright information to files
* Added a README with instructions on how to enable the 1x2u layout.
* Add a default chosen matrix transform in the default keymap, alongside a commented out version for the alternate layout.
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Co-authored-by: Peter Johanson <peter@peterjohanson.com>
Co-authored-by: Cem Aksoylar <caksoylar@users.noreply.github.com>
