(feat:Console) - Add update iceberg table functionality

[vignesh-manel]

Adds the functionality to update Iceberg table using Edit Schema option in table details page.

Features:

• Edit, add, and remove fields on an existing table's schema from the UI
• Preserves existing field IDs to maintain schema compatibility
• Preserves identifier-field-ids (used for row-level operations/upserts) across schema updates
• Optimistic concurrency via assert-current-schema-id — concurrent schema changes are detected and surfaced as an error
• Warning banner shown when fields are removed, indicating existing data in those columns will become inaccessible

Known Limitations / Future Work:

• Json Schema Editor has not been added
• Nested struct fields inside list element types are not covered by the removed-field count warning
• Type changing on existing fields is allowed in the UI but may be rejected by the Iceberg catalog depending on compatibility rules — no pre-validation is performed client-side

Screen.Recording.2026-03-19.at.6.22.07.PM.mov

[vignesh-manel]

@jbonofre Requesting for a review whenever you have time. Thanks