dev: init zmk files

boards/shields/phiboard/phiboard_right.overlay

@@ -0,0 +1,19 @@
+// This file was generated from a template. Edit it to match your keyboard.
+// See https://zmk.dev/docs/development/hardware-integration/new-shield for more
+// instructions.
+
+#include "phiboard.dtsi"
+
+&default_transform {
+    // Set this to the number of columns on the left side.
+    col-offset = <2>;
+};
+
+&kscan {
+    // Replace these comments with the GPIO pins in the matrix for the right side.
+    // See https://zmk.dev/docs/development/hardware-integration/new-shield#shield-overlays
+    col-gpios
+        = <&xiao_d 0 GPIO_ACTIVE_HIGH>
+        , <&xiao_d 0 GPIO_ACTIVE_HIGH>
+        ;
+};