* 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.
* rename alf_x2 to alf
* rename to x2
* rename dependencies
* Fix readme
* moved x2 into alf directory
* update readme for make instructions
* move dc60 to alf directory
* update dc60 readme for make instructions
* change readme txt as per noroadsleft PR comment