✨ Add book deployment workflow

.github/workflows/book.yaml

@@ -0,0 +1,30 @@
+name: Book Deployment
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      deployments: write
+    name: Publish to GitHub Pages
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v4
+      - name: Setup mdBook
+        uses: peaceiris/actions-mdbook@v1
+        with:
+          mdbook-version: '0.4.10'
+          # mdbook-version: 'latest'
+      - name: Build book
+        working-directory: ./book
+        run: mdbook build
+      - name: Deploy
+        uses: peaceiris/actions-gh-pages@v3
+        if: ${{ github.ref == 'refs/heads/main' }}
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./book/book