Fix #185 Don't depend on GHC.IO.* from base, from GHC 9.10

[mpilgrem]

See:

• Switch to using Win32 for obtaining Windows handles #185

We don't want to depend on Win32, but we can skip base and depend on ghc-internal directly.

[bgamari]

@mpilgrem I would strongly advise against this. We really do not want people depending directly on ghc-internal (and even considered making it technically impossible for users to do so, although ultimately decided against this). ghc-internal is an implementation detail of GHC's standard libraries and is neither versioned nor structured for end-user consumption.

I would suggest that we revert this change such that we can discuss what is needed to avoid such a direct dependency. We are happy to introduce needed functionality into base but we want to do so in a way that avoids exposing too many implementation details, enabling a robust compatibility story in the future.

[jeltsch]

See #187 for an alternative solution, which avoids the ghc-internal dependency.

[mpilgrem]

@bgamari, always happy to follow your recommendations! @jeltsch, thanks for your continued search for a way through. I'm tied up for the next week but will return to this when I am free.