feature: ability to find the test associated to an actual function

[primalmotion]

Hi,

it would be handy to support calling run() from an actual Function implementation, and let neotest-go find its test, so we can run the test without having to find the TestFunction first.

[sergii4]

I think it is on plugin, neotest itself, than on an adapter, because plugin provides and interface, adapter just follows it

[primalmotion]

Couldn't the "nearest" method be used? In a sense, that's the nearest test

[sergii4]

I believe those mechanics are under neotest, because it is not specific to Go, nearest test is common thing for any language and respectively should be covered by neotest, not neotest-go