feat: implement config-driven link page

Single-page link-in-bio site at config.yaml -> build.js -> _site/index.html.
Links flagged with `repo: owner/name` get live star count and last-commit
age decoration from the GitHub REST API at build time.

Stack: vanilla HTML/CSS output, Node 20 build script (sole dep: js-yaml).
Deploy: GitHub Actions Pages artifact, daily cron + push triggers.

Architecture inspired by linkyee (MIT); no source code copied. See NOTICE.

.github/workflows/deploy.yml

@@ -0,0 +1,48 @@
+name: Deploy to Pages
+
+on:
+  push:
+    branches: [main]
+  schedule:
+    # Daily 00:00 UTC — refreshes stars + last-commit decoration on repo links.
+    - cron: "0 0 * * *"
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: pages
+  cancel-in-progress: true
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+    environment:
+      name: github-pages
+      url: ${{ steps.deploy.outputs.page_url }}
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: npm
+
+      - run: npm ci
+
+      - name: Build site
+        run: node build.js
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - uses: actions/configure-pages@v5
+
+      - uses: actions/upload-pages-artifact@v3
+        with:
+          path: _site
+
+      - id: deploy
+        uses: actions/deploy-pages@v4