added deploy_docs

.github/workflows/deploy_docs.yaml

@@ -0,0 +1,33 @@
+name: Deploy Docs to GitHub Pages
+
+on:
+  push:
+    branches:
+      - main
+      - nightly
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout the repository
+      uses: actions/checkout@v3
+
+    - name: Set up Node.js (optional, if you need it for building docs)
+      uses: actions/setup-node@v3
+      with:
+        node-version: '16'
+
+    - name: Install dependencies (if needed)
+      run: npm install
+
+    - name: Build documentation (if your docs need building)
+      run: npm run build-docs # or any other command to build docs
+
+    - name: Deploy to GitHub Pages
+      uses: peaceiris/actions-gh-pages@v4
+      with:
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+        publish_dir: ./_docs
+        publish_branch: gh-pages