Initial attempt to merge internal_state with kmk_keyboard. Seems to work on Plank so far

fix formatting

Example of new "Extension"/plugin system, using LED

Cleanup of RGB code

staticmethod to proper, normal methods

Needs cleanup, but: migrate Leader to Extension API

remove useless self reurns

fix an AttributeError with Leader key removal

Checkpoint from the weekend: split as an Extension (not working or done yet)

wip

kmk/consts.py

@@ -9,10 +9,3 @@ class UnicodeMode:
     LINUX = IBUS = 1
     MACOS = OSX = RALT = 2
     WINC = 3
-
-
-class LeaderMode:
-    TIMEOUT = 0
-    TIMEOUT_ACTIVE = 1
-    ENTER = 2
-    ENTER_ACTIVE = 3