[Keyboard] Nebula12 keyboard (#9397)

Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: Drashna Jaelre <drashna@live.com>

keyboards/nebula12/nebula12.h

@@ -0,0 +1,35 @@
+/* Copyright 2020 Yiancar
+ *
+ * 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
+
+#define XXX KC_NO
+
+#include "quantum.h"
+#include "../wilba_tech/wt_rgb_backlight_keycodes.h"
+
+// This a shortcut to help you visually see your layout.
+
+#define LAYOUT_all( \
+    K00, K01, K02, \
+    K10, K11, K12, \
+    K20, K21, K22, \
+    K30, K31, K32 \
+) { \
+    { K00, K01, K02, }, \
+    { K10, K11, K12, }, \
+    { K20, K21, K22, }, \
+    { K30, K31, K32, }  \
+}