CI: add a workflow to deploy documentation to GitHub Pages

.github/workflows/material-for-mkdocs.yml

@@ -0,0 +1,44 @@
+name: Deploy Material for MkDocs documentation to GitHub Pages
+
+env:
+  AZURE_WEBAPP_NAME: st-undp
+  PYTHON_VERSION: '3.11'
+
+on:
+  push:
+    branches: [ "main" ]
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Configure Git Credentials
+        run: |
+          git config user.name github-actions[bot]
+          git config user.email 41898282+github-actions[bot]@users.noreply.github.com
+
+      - name: Set up Python version
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ env.PYTHON_VERSION }}
+          cache: 'pip'
+
+      - name: Install Poetry
+        run: |
+          curl -sSL https://install.python-poetry.org | python3 -
+          echo "$HOME/.local/bin" >> $GITHUB_PATH
+
+      - name: Install dependencies
+        run: |
+          poetry config virtualenvs.create false
+          poetry install --only docs
+
+      - name: Deploy to GitHub Pages
+        run: mkdocs gh-deploy --force