Restructure the Iceberg Catalog wiki into a hub page with dedicated
integration guides for each query engine:
- Trino Iceberg Integration (new)
- Spark Iceberg Integration (new)
- RisingWave Iceberg Integration (new)
- Lakekeeper Iceberg Integration (new)
- DuckDB Iceberg Integration (existing)
The main SeaweedFS Iceberg Catalog page now focuses on architecture,
auth concepts, and links to per-engine guides. All examples are
derived from the CI integration test configurations.