track logging in PurePrompt state

[aleeusgr]

Describe the feature request
add a parameter to add a log queue accumulator in the prompt state:

type LogQueue = [Text]

newtype PurePrompt a = PurePrompt
{ _runPrompt
    :: NonEmpty String
    -> Either BreakException (a, NonEmpty (LogQueue, String))
}
deriving (Functor)

Additional context
Fixing a bug #9346 a suggested testing strategy is to parse log outputs to confirm that the changes to the code had the desired effect. To achieve this the requested changes were suggested.

Thanks to @emilypi for the code suggestion and the collaboration

[mpickering]

If the goal here is to write a test then it seems much simpler to add a test to cabal-testsuite/PackageTests than adding a unit test.

[aleeusgr]

It's a more general enhancement that would allow automating tests for changes related to logging in cabal-install.

Is it not?

I'm sorry, the description could be more specific.