add docs and notices action

.github/workflows/update-docs-and-notices.yml

@@ -0,0 +1,26 @@
+# cannot use the default workflow (https://github.com/yext/slapshot-reusable-workflows)
+# because of the monorepo structure
+name: Check and Update Repo's documenation and third party notices
+
+on: pull_request
+
+jobs:
+  update-docs-and-third-party-notices:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          ref: ${{ github.head_ref }}
+          token: ${{ secrets.BOT_REPO_SCOPED_TOKEN }}
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 16.x
+      - run: npm ci --ignore-scripts
+      - run: npm run build
+      - name: Update Documentation
+        uses: EndBug/add-and-commit@v9
+        with:
+          message: "Automated update to repo's documentation and third party notices from github action"
+          add: '**/*.md **/THIRD-PARTY-NOTICES'
+          push: true
+          default_author: github_actions