* 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.
* various edits and minor additions
* updates
* updates
* updates
* lets_split LEDs off instructions
* lets_split LEDs off instructions
* turn off lets_split LEDs in userspace
* one-hand setup for right side