add dummy workflow to allow developing workflow in followup pr

.github/workflows/build_dependencies.yaml

@@ -0,0 +1,16 @@
+name: Build Dependencies
+
+on:
+  schedule:
+    - cron: '0 0 1 * *'  # Run at midnight on the first of every month
+  workflow_dispatch:
+  pull_request:  # TODO: remove once fully implemented
+
+jobs:
+  build_grpc:
+    name: Build gRPC artifacts
+    runs-on: ubuntu-latest
+    timeout-minutes: 60
+    steps:
+      - name: Check out codebase
+        uses: actions/checkout@v4