define new keyboard "Hecomi" (#5147)

* update pinout for matrix

* first commit

* include split_common.h

* change split_common.h to split_util.h

* update config.h

* update keymap & config

* update

* remove K70, add K77

* fixed test keymap

* add Layer

* define to HHKB pro 2 based keymap

* change authoer name

* define LAYOUT and LAYOUT_KC

* replace from LAYOUT_KC to LAYOUT

* change name hecomi_alpha to hecomi/alpha

* fixed hecomi_alpha to hecomi/alpha

* remove unnecessary files

* update readme

* add DEFAULT_FOLDER

* remove hecomi_alpha because change name to hecomi

* remove bad LAYOUT macro

* remove IS_COMMAND macro

* remove unnecessary RGB options

* Update keyboards/hecomi/hecomi.h

Co-Authored-By: takashiski <takashiskibb@gmail.com>

* Update keyboards/hecomi/hecomi.h

Co-Authored-By: takashiski <takashiskibb@gmail.com>

* Update keyboards/hecomi/alpha/rules.mk

Co-Authored-By: takashiski <takashiskibb@gmail.com>

* Update keyboards/hecomi/alpha/rules.mk

Co-Authored-By: takashiski <takashiskibb@gmail.com>

* Update keyboards/hecomi/hecomi.h

Co-Authored-By: takashiski <takashiskibb@gmail.com>

* remove endif

* update rule.mk with suggestions

keyboards/hecomi/keymaps/default/config.h

@@ -0,0 +1,19 @@
+/* Copyright 2018 REPLACE_WITH_YOUR_NAME
+ *
+ * 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
+
+// place overrides here