[Keyboard] add rad keyboard (#17088)

Co-authored-by: zvecr <git@zvecr.com>

keyboards/rad/config.h

@@ -0,0 +1,33 @@
+/* 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#pragma once
+
+#include "config_common.h"
+
+/* key matrix size */
+#define MATRIX_ROWS 4
+#define MATRIX_COLS 3
+
+/* key matrix pins */
+#define MATRIX_ROW_PINS { D7, C6, B6, D0 }
+#define MATRIX_COL_PINS { B5, B4, E6 }
+#define UNUSED_PINS
+
+/* COL2ROW or ROW2COL */
+#define DIODE_DIRECTION COL2ROW
+
+/* Bootmagic key configuration */
+#define BOOTMAGIC_LITE_ROW 0
+#define BOOTMAGIC_LITE_COLUMN 2