feat: add github action to automatically deploy on main branch

Author: zhigang1992

.github/workflows/docs.yaml

@@ -0,0 +1,42 @@
+name: Build and Deploy Docs
+
+on:
+  push:
+    branches:
+      - main  # or your default branch name
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+    
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    - name: Setup Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: '20'
+
+    - name: Install pnpm
+      uses: pnpm/action-setup@v2
+      with:
+        version: 9
+
+    - name: Install dependencies
+      run: pnpm install
+
+    - name: Build docs
+      run: pnpm docs
+
+    - name: Setup Pages
+      uses: actions/configure-pages@v4
+
+    - name: Upload artifact
+      uses: actions/upload-pages-artifact@v3
+      with:
+        path: './docs' 
+
+    - name: Deploy to GitHub Pages
+      id: deployment
+      uses: actions/deploy-pages@v4