Add a button to run related tests

[sheremet-va]

Clear and concise description of the problem

Similar to Jest's "Run related test" - add a command to run tests related to the current/selected file.

Vitest supports this via related option in the config

Additional context

No response

Validations

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• 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.