[Keyboard] Add keyboard hifumi (#5341)

* Add keyboard hifumi

* Update keyboards/hifumi/Readme.md

Co-Authored-By: zk-phi <zk-phi@users.noreply.github.com>

* Update keyboards/hifumi/Readme.md

Co-Authored-By: zk-phi <zk-phi@users.noreply.github.com>

* Update keyboards/hifumi/Readme.md

Co-Authored-By: zk-phi <zk-phi@users.noreply.github.com>

* Update keyboards/hifumi/keymaps/default/keymap.c

Co-Authored-By: zk-phi <zk-phi@users.noreply.github.com>

* Update keyboards/hifumi/keymaps/test/keymap.c

Co-Authored-By: zk-phi <zk-phi@users.noreply.github.com>

* Update keyboards/hifumi/Readme.md

Co-Authored-By: zk-phi <zk-phi@users.noreply.github.com>

* Add DIODE_DIRECTION

* Rename readme.md

keyboards/hifumi/hifumi.h

@@ -0,0 +1,31 @@
+/* Copyright 2019 zk-phi
+ *
+ * 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 "quantum.h"
+
+// This a shortcut to help you visually see your layout.
+// The following is an example using the Planck MIT layout
+// The first section contains all of the arguments
+// The second converts the arguments into a two-dimensional array
+#define LAYOUT( \
+    k00, k01, k02, \
+    k10, k11, k12 \
+) \
+{ \
+    { k00, k01, k02 }, \
+    { k10, k11, k12 } \
+}