- Replace GITHUB_TOKEN with PAGES_SYNC_TOKEN for external repo access
- Add graceful degradation when token is not configured
- Add setup documentation in GITHUB_PAGES_SYNC_SETUP.md
- Update GITHUB_CI_CD_SETUP.md with token configuration steps
Co-authored-by: Mouy-leng <199350297+Mouy-leng@users.noreply.github.com>
