add github pages workflow

.github/workflows/gh-pages.yml

@@ -0,0 +1,24 @@
+name: Deploy to GitHub Pages
+
+on:
+  push:
+    branches: [main]
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Install bun
+        uses: oven-sh/setup-bun@v2
+      - name: Install dependencies
+        run: bun install --frozen-lockfile
+      - name: Build
+        run: bun run build
+      - name: Deploy
+        uses: peaceiris/actions-gh-pages@v4
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./public/