[Keyboard] Add splitish (#8751)

* Added personal minivan keymap, and started work on splitish directory

* Merge branch 'splitish' of github.com:RSchneyer/qmk_firmware into splitish

Trying to undo attempted fix

Added splitish keyboard files, removed personal Minivan keymap

* Removed personal Minivan keymaps

* Fixed small issue in readme

* Added changes based on inital PR feedback

* forgot a semicolon

* Quick config.h file and default keymap update

keyboards/splitish/splitish.c

@@ -0,0 +1 @@
+#include "splitish.h"