ci: gh pages for sphinx docs

.github/workflows/docs.yml

@@ -0,0 +1,26 @@
+name: "Sphinx: Render docs"
+
+on: push
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+      - name: Build HTML
+        uses: ammaraskar/sphinx-action@master
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: html-docs
+          path: docs/build/html/
+      - name: Deploy
+        uses: peaceiris/actions-gh-pages@v3
+        if: github.ref == 'refs/heads/main'
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: docs/build/html

docs/requirements.txt

@@ -0,0 +1 @@
+furo==2021.11.16