[Keyboard] add SNOP60 (#17131)

Co-authored-by: Joel Challis <git@zvecr.com>
Co-authored-by: Drashna Jaelre <drashna@live.com>

keyboards/checkerboards/snop60/keymaps/7u/config.h

@@ -0,0 +1,25 @@
+ /* 
+ Copyright 2020 Alec Penland
+ Copyright 2020 Garret Gartner
+  
+ 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 TAPPING_TERM 175
+
+#define PERMISSIVE_HOLD
+
+#define MOD_TAP_INTERUPT