Have a button to see transformed result

[sheremet-va]

Clear and concise description of the problem

Currently it's hard to know how transformed file looks like without going into the UI or enabling server.debug option (that was removed in the latest vitest version)

Suggested solution

Simillar to UI:

Alternative

No response

Additional context

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.