dev: init zmk files

build.yaml

@@ -0,0 +1,22 @@
+# This file generates the GitHub Actions matrix.
+# For simple board + shield combinations, add them to the top level board and
+# shield arrays, for more control, add individual board + shield combinations
+# to the `include` property. You can also use the `cmake-args` property to
+# pass flags to the build command, `snippet` to add a Zephyr snippet, and
+# `artifact-name` to assign a name to distinguish build outputs from each other:
+#
+# board: [ "nice_nano_v2" ]
+# shield: [ "corne_left", "corne_right" ]
+# include:
+#   - board: bdn9_rev2
+#   - board: nice_nano_v2
+#     shield: reviung41
+#   - board: nice_nano_v2
+#     shield: corne_left
+#     snippet: studio-rpc-usb-uart
+#     cmake-args: -DCONFIG_ZMK_STUDIO=y
+#     artifact-name: corne_left_with_studio
+#
+---
+null
+...