GA deploy-docs: add workflow

.github/workflows/deploy-docs.yml

@@ -0,0 +1,33 @@
+name: Deploy Sphinx Documentation
+
+on: [push]
+permissions:
+  contents: write
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.10"
+
+      - name: Install dependencies
+        run: |
+          pip install sphinx sphinx-rtd-theme
+          pip install -e .
+
+      - name: Build documentation
+        run: |
+          make -C docs html
+          touch docs/build/html/.nojekyll
+
+      - name: Deploy to GitHub Pages
+        uses: JamesIves/github-pages-deploy-action@v4
+        with:
+          branch: gh-pages
+          folder: docs/build/html