ci: add workflow for deploying Sphinx documentation

Author: FlysonBot

.github/workflows/deploy_sphinx.yaml

@@ -0,0 +1,39 @@
+name: Deploy Sphinx Documentation
+
+on:
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.10'
+
+      - name: Install dependencies
+        run: |
+          pip install -r requirements.txt
+          pip install -r docs/requirements.txt
+
+      - name: Generate rst files
+        run: sphinx-apidoc -o docs/source src/mastermind -f --templatedir=docs/source/_templates --maxdepth=2 --module-first
+
+      - name: Build documentation
+        run: |
+          cd docs
+          make html
+
+      - name: Deploy to GitHub Pages
+        if: success()
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./docs/build/html
+          publish_branch: gh-pages
+          keep_files: false  # remove old files