Add content to GitHub Pages workflow file

- Fill empty pages.yml with complete workflow configuration
- Include proper MkDocs build and deployment steps
- This should finally enable GitHub Pages deployment

Author: DimaJoyti

.github/workflows/pages.yml

@@ -0,0 +1,48 @@
+name: Deploy to GitHub Pages
+
+on:
+  push:
+    branches: [ main ]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - uses: actions/setup-python@v4
+      with:
+        python-version: '3.11'
+
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install mkdocs mkdocs-material pymdown-extensions
+
+    - name: Build documentation
+      run: mkdocs build --clean
+
+    - uses: actions/configure-pages@v4
+
+    - uses: actions/upload-pages-artifact@v3
+      with:
+        path: ./site
+
+  deploy:
+    runs-on: ubuntu-latest
+    needs: build
+
+    steps:
+    - uses: actions/deploy-pages@v4
+      id: deployment