[FEATURE] preview UI improvements with basic operations that does not require raw SQL

## Is your feature request related to a problem?

Improve database preview with basic operations that can be done directly in the UI (as opposed to needing to write SQL).

Example in Drizzle Studio:

- https://demo.drizzle.studio

## Describe the solution you'd like

One or more of these:

- get a quick view of child objects in a sub view

- filter
- sort
- column management (visibility selection and rearrange)
- table structure view

- for the current sort/filter/column configurations (done in UI), have a way to convert that into a SQL query

The implementation/design doesn't need to match exactly - just any way to more quickly make or view simple changes without needing to type raw SQL will help.

## Describe alternatives you've considered

Using drizzle-studio

## Use Case

For quickly editing data / browsing records without needing to write SQL directly

Start by reviewing the existing database preview UI and comparing it with the requested operations: child-object views, filtering, sorting, column management, structure views, and SQL conversion. The issue does not name files, tests, or a single selected operation, so confirm the scope and define completion criteria before locating the relevant entry points.

Written by the indexing model from the issue text.