add workflow

Author: danil-tolkachev

.github/workflows/build.yml

@@ -0,0 +1,5 @@
+on: [push, pull_request, workflow_dispatch]
+
+jobs:
+  build:
+    uses: zmkfirmware/zmk/.github/workflows/build-user-config.yml@main

build.yaml

@@ -0,0 +1,31 @@
+# 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, e.g:
+#
+# board: [ "nice_nano_v2" ]
+# shield: [ "blue-velvet_left", "blue-velvet_right" ]
+# include:
+#   - board: bdn9_rev2
+#   - board: nice_nano_v2
+#     shield: reviung41
+
+---
+include:
+  - board: ergohaven
+    shield: velvet_v3_left
+    snippet: studio-rpc-usb-uart
+    cmake-args: -DCONFIG_ZMK_STUDIO=y
+  - board: ergohaven
+    shield: velvet_v3_right
+
+  - board: ergohaven
+    shield: op36_left
+    snippet: studio-rpc-usb-uart
+    cmake-args: -DCONFIG_ZMK_STUDIO=y
+  - board: ergohaven
+    shield: op36_right
+
+  - board: ergohaven
+    shield: settings_reset