Simplify GitHub Pages deployment workflow

- Use more reliable peaceiris/actions-gh-pages action
- Remove complex Pages API configuration
- Add CNAME for proper domain setup
- This should resolve deployment issues

Author: SyntaxSidekick

.github/workflows/deploy.yml

@@ -3,49 +3,34 @@ name: Deploy to GitHub Pages
 on:
   push:
     branches: [ main ]
-  pull_request:
-    branches: [ main ]
 
 permissions:
   contents: read
   pages: write
   id-token: write
 
-concurrency:
-  group: "pages"
-  cancel-in-progress: false
-
 jobs:
-  build-and-deploy:
-    environment:
-      name: github-pages
-      url: ${{ steps.deployment.outputs.page_url }}
+  deploy:
     runs-on: ubuntu-latest
-    
     steps:
-    - name: Checkout
-      uses: actions/checkout@v4
-      
-    - name: Setup Node.js
-      uses: actions/setup-node@v4
-      with:
-        node-version: '18'
-        cache: 'npm'
-        
-    - name: Install dependencies
-      run: npm ci
-      
-    - name: Build
-      run: npm run build
-      
-    - name: Setup Pages
-      uses: actions/configure-pages@v3
-      
-    - name: Upload artifact
-      uses: actions/upload-pages-artifact@v2
-      with:
-        path: ./dist
-        
-    - name: Deploy to GitHub Pages
-      id: deployment
-      uses: actions/deploy-pages@v2
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '18'
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build
+        run: npm run build
+
+      - name: Deploy to GitHub Pages
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./dist
+          cname: syntaxsidekick.github.io