ci: add GitHub Pages deployment workflow

- Add CNAME file for powerspawn.com custom domain
- Add GitHub Actions workflow for automatic deployment on push to main
- Deploys site/dist to GitHub Pages

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: CynaCons

.github/workflows/deploy-site.yml

@@ -0,0 +1,58 @@
+name: Deploy Landing Page
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - 'site/**'
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: 'pages'
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+          cache-dependency-path: site/package-lock.json
+
+      - name: Install dependencies
+        working-directory: site
+        run: npm ci
+
+      - name: Build
+        working-directory: site
+        run: npm run build
+
+      - name: Setup Pages
+        uses: actions/configure-pages@v4
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: site/dist
+
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

site/public/CNAME

@@ -0,0 +1 @@
+powerspawn.com