Table: Cell inspector auto-detecting JSON

[gtk-grafana]

What is this feature?

Automatically setting the inspect type to json if the value can be parsed as JSON. This will automatically show the JSON/code view when the user clicks on the inspect icon within a table cell.

Why do we need this feature?
It's hard to read JSON without any formatting.
#79589

Who is this feature for?
Table users, specifically logs table in explore.

Which issue(s) does this PR fix?:
Fixes #79589

Special notes for your reviewer:

Please check that:

• It works as expected from a user's perspective.
• If this is a pre-GA feature, it is behind a feature toggle.
• The docs are updated, and if this is a notable improvement, it's added to our What's New doc.

[ryantxu]

much better -- happy we avoid trying to read every cell as json 😜