* Remove chording as it is not documented, not used, and needs work.
* Make Leader Key an optional feature.
* Switch from `PREVENT_STUCK_MODIFIERS` to `STRICT_LAYER_RELEASE`
* Remove `#define PREVENT_STUCK_MODIFIERS` from keymaps.
* jennetters fourier keymap, tapdance declarations and reformatted keymap file for readbility
* Update rules and keymap to follow new makefile setup.
* Add #pragma once to config.h