[Keyboard] add Labyrinth75 (#11135)
* added Labyrinth75
* changed to lowercase inline with the PR checklist
* added a correctly formatted image to readme.md
* fixed imgur link
* fixed info.json
* Update keyboards/labyrinth75/keymaps/default/keymap.c
Co-authored-by: ridingqwerty <george.g.koenig@gmail.com>
* Update keyboards/labyrinth75/labyrinth75.h
Co-authored-by: ridingqwerty <george.g.koenig@gmail.com>
* remove superfluous backslashes
* Update keyboards/labyrinth75/config.h
Co-authored-by: Drashna Jaelre <drashna@live.com>
Co-authored-by: ridingqwerty <george.g.koenig@gmail.com>
Co-authored-by: Drashna Jaelre <drashna@live.com>
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