feat: support watching files for changes

[UtkarshVerma]

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Is your feature request related to a problem? Please describe. For some reason, watching the source file for changes does not rerun the corresponding tests. It works for Rust projects, though, which leads me to believe that this is related to this plugin.

Describe the solution you'd like Marking a file to be watched should rerun tests whenever changes occur.

Describe alternatives you've considered N/A

Additional context https://github.com/nvim-neotest/neotest?tab=readme-ov-file#watch-tests