Enhance cluster comparison documentation and improve DataTables integration

- Updated the cluster comparison section in tud-clusters.md to provide a clearer overview of available clusters for TU Delft researchers, including a new alert for quick reference and a detailed table format.
- Added a new alert section for tips on using clusters effectively.
- Improved the DataTables initialization script in body-end.html to ensure proper setup for both nodes-table and clusters-table, including responsive column definitions and logging for better debugging.