Init: Corne-only zmk-config

Extracted from zmk-config-archive (multi-board repo).
Corne 42-key with nice_nano_v2, nice_oled, RGB, ZMK Studio, Javelin steno.

boards/shields/corne/corne_right.overlay

@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2020 Pete Johanson
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include "corne.dtsi"
+
+&default_transform {
+    col-offset = <6>;
+};
+
+&five_column_transform {
+    col-offset = <6>;
+};
+
+&kscan0 {
+    col-gpios
+        = <&pro_micro 14 GPIO_ACTIVE_HIGH>
+        , <&pro_micro 15 GPIO_ACTIVE_HIGH>
+        , <&pro_micro 18 GPIO_ACTIVE_HIGH>
+        , <&pro_micro 19 GPIO_ACTIVE_HIGH>
+        , <&pro_micro 20 GPIO_ACTIVE_HIGH>
+        , <&pro_micro 21 GPIO_ACTIVE_HIGH>
+        ;
+};
+
+// vim: filetype=dts fdm=marker: