Migrating over userspace

- existing repo was not forked. Wanted to make sure I was using the standard,
not replicating it
- Updated the readme.md for the latest mappings

users/t4corun/features/combo.h

@@ -0,0 +1,12 @@
+#pragma once
+#include "t4corun.h"
+
+enum combos {
+  //DRAGTOGGLE,
+  //SNIPERTOGGLE,
+  //MOUSEBUTTON4,
+  COMBO_LENGTH
+};
+
+//their documentation is so confusing because you don't use COMBO_LEN defining the actions
+uint16_t COMBO_LEN = COMBO_LENGTH;