* update for LTO and guard RGBLED_SPLIT
* Revert "update for LTO and guard RGBLED_SPLIT"
This reverts commit ce81177cbe.
* Revert "Revert "update for LTO and guard RGBLED_SPLIT""
This reverts commit 67da0ce9f3.
* update iris keymap for keymap_kc removal and overhaul userspace
* add licenses
* fix tap_dance error when rgblight is disabled and update/clean iris/sinc maps