Merge Funcky.Async back into Funcky

[tautropfli]

Considering that the System.Linq.Async package is going to be part of the BCL I propose that we merge Funcky.Async back into Funcky.

I haven't had time to dig into the specifics, however one thing that I have noticed is that the BCL doesn't use the *Await, *WithCancellation convention e.g. the version of Select that takes an async selector is called Select, not SelectAwait.

[FreeApophis]

What is blocking this?

IMHO this should be done for the .NET 10 update.

The question really is if we can label this with a Minor change. I suppose it gives problems if you used both nugets.