[Keymap] Userspace refactor, adding leader key functionality (#7790)

* Userspace refactor

* Fixed missed ifdef

* tapcode16, adjust layout

* glcdfont changes from #7745

* Modify Keymaps, add workman

* RGB & OLED update

users/curry/leader.h

@@ -0,0 +1,3 @@
+#pragma once
+
+void matrix_scan_user(void);