[Keyboard] DMQ Design SPIN (#8820)
* added SPIN keyboard and respective keymaps
* Update keyboards/dmqdesign/spin/keymaps/default/keymap.c
* Update keyboards/dmqdesign/spin/keymaps/encoderLayers/keymap.c
* Update keyboards/dmqdesign/spin/rules.mk
* Update keyboards/dmqdesign/spin/spin.c
* Update keyboards/dmqdesign/spin/spin.h
* Update keyboards/dmqdesign/spin/keymaps/encoderLayers/keymap.c
* Update keyboards/dmqdesign/spin/readme.md
* Update keyboards/dmqdesign/spin/readme.md
* Update keyboards/dmqdesign/spin/spin.h
* Update keyboards/dmqdesign/spin/rules.mk
* Update keyboards/dmqdesign/spin/config.h
* Update keyboards/dmqdesign/spin/keymaps/encoderLayers/keymap.c
* Update keyboards/dmqdesign/spin/keymaps/encoderLayers/keymap.c
* changed keymap to all lowercase, removed LED typecasts
* made encoderLayers all lowercase
* fixed the duplicate folder after changing name (hopefully)
* fixed the info.json, followed the keyboard support doc
* Update keyboards/dmqdesign/spin/info.json
* Update keyboards/dmqdesign/spin/info.json
* Update keyboards/dmqdesign/spin/info.json
* Update keyboards/dmqdesign/spin/info.json