Check in protobuf generated files

So that developers do not have to install protobuf suite by default.

.github/workflows/ci.yml

@@ -77,6 +77,11 @@ jobs:
       - name: build
         run: npm run build
 
+      - name: Check no proto files changed
+        shell: bash
+        run: |
+          [ $(git status --short --ignore-submodules|wc -l) -eq 0 ]
+
       - name: test
         run: npm run test