PREVENT_STUCK_MODIFIERS
* 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.
* add ergoinu * remove unnecessary code * replace include guard delete unused code * remove unused RGBLED defines