proto: add CI

This patch enables CI for proto files.

.github/workflows/lint.yaml

@@ -0,0 +1,23 @@
+name: lint
+
+on:
+  push:
+    branches:
+      - master
+    tags:
+      - '**'
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  protobuf:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Check clang-format
+        run: clang-format --version
+
+      - name: Checking protobuf syntax
+        run: clang-format --dry-run --verbose -Werror proto/*.proto