added yml file

.github/workflows/gh-pages.yml

@@ -0,0 +1,45 @@
+name: Deploy GitHub Pages
+
+on:
+  push:
+    branches:
+      - main  # Set a branch name to trigger deployment
+jobs:
+  deploy:
+    runs-on: ubuntu-20.04
+    permissions:
+      contents: write
+    concurrency:
+      group: ${{ github.workflow }}-${{ github.ref }}
+    env:
+      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          context: .
+          submodules: true 
+          fetch-depth: 0
+      - name: Set up Python
+        uses: actions/[email protected]
+        with:
+          context: .
+          python-version: 3.9
+      - name: Install sphinx
+        run: |
+          pip install sphinx
+          pip install furo
+          pip install sphinx-togglebutton
+          pip install sphinx-favicon
+          pip install sphinxcontrib.bibtex
+      - name: Build
+        run: |
+          cd docs/
+          make clean
+          make html
+      - name: Deploy
+        uses: peaceiris/actions-gh-pages@v3
+        if: ${{ github.ref == 'refs/heads/main' }}
+        with:
+          context: .
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./docs/