move mechkeys keyboards into the mechkeys/ vendor folder (#15760)

* move mechkeys keyboards to mechkeys/

* fix compilation

* fix default folder

keyboards/mechkeys/mechmini/v2/keymaps/arkag/config.h

@@ -0,0 +1,23 @@
+/* Copyright 2021 Alex Kagno
+  * 
+  * 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
+
+// save me space!
+#define NO_ACTION_MACRO
+#define NO_ACTION_FUNCTION
+// #define DISABLE_LEADER
+#define NO_MUSIC_MODE