feat: add GH_PAT token and fetch-depth to GitHub Actions workflows

- Add fetch-depth: 1 to all checkout actions for faster checkout
- Add token: ${{ secrets.GH_PAT }} to all checkout actions
- This enables access to private submodules and improves checkout performance

.github/workflows/link-check.yml

@@ -12,6 +12,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
+          token: ${{ secrets.GH_PAT }}
       - uses: lycheeverse/lychee-action@v2
         with:
           args: --no-progress --insecure --user-agent 'curl/7.68.0' --exclude '.*api\.star-history\.com.*' --accept 200,201,202,203,204,205,206,207,208,226,300,301,302,303,304,305,306,307,308,503 README.md docs/ apps/ examples/ benchmarks/