Add firmware for the key cluster module based on the firmware of the left keyboard half.

keycluster/src/main.h

@@ -0,0 +1,17 @@
+#ifndef __MAIN_H__
+#define __MAIN_H__
+
+// Includes:
+
+    #include "key_matrix.h"
+
+// Macros:
+
+    #define KEYBOARD_MATRIX_COLS_NUM 7
+    #define KEYBOARD_MATRIX_ROWS_NUM 5
+
+// Variables:
+
+    extern key_matrix_t keyMatrix;
+
+#endif