Add link checker workflow

.github/workflows/link-checker.yaml

@@ -0,0 +1,33 @@
+name: Link Checker (Fail Fast)
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+
+jobs:
+  preview:
+    name: Preview Deploy
+    runs-on: ubuntu-latest
+    outputs:
+      preview_url: ${{ steps.waitForVercelPreviewDeployment.outputs.url }}
+    steps:
+      - name: Wait for Vercel preview deployment to be ready
+        uses: patrickedqvist/[email protected]
+        id: waitForVercelPreviewDeployment
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          check_interval: 30
+          max_timeout: 600
+
+  link_checker:
+    runs-on: ubuntu-latest
+    needs: preview
+    timeout-minutes: 15
+    steps:
+      - uses: actions/checkout@v3
+      - name: Link Checker
+        uses: lycheeverse/[email protected]
+        with:
+          fail: true
+          args: --verbose --no-progress --exclude '^https://github.com/.*.mdx' ${{ needs.preview.outputs.preview_url }}