[ux]: Add Json and List pretty-printing in "Result" block of query output

[denlove]

Goal and Context

As a developer using the YDB Embedded UI, I cannot effectively inspect or debug data in columns with the Json and List types. Currently, its output is displayed as a single, minified, unformatted string. This makes it impossible to read nested structures or find specific fields without copying the value into an external formatter.

We already have a positive experience with the Yandex Cloud (console.yandex.cloud), where Json output is well-structured, pretty-printed, and easy to read. The lack of this feature in the standalone Embedded UI is a significant step back in terms of ergonomics and developer productivity.

It should be able to toggle sort of "Pretty-print JSON" on/off in the UI settings.

Attachments

Now in Embedded UI:

Now in console.yandex.cloud:

Environment

• Interface version: 14.5.0
• Browser: Yandex Browser 26.3.1.1032 corp-ext (64-bit)
• OS: macOS Tahoe 26.3

[Arunkoo]

#3801