provide alternative for non aspnet code

[JanEggers]

Hi there,

awesome library could you please provide a class the lets you monitor a call stuff that is not aspnet related.

i wanted to add this to my unittest to make shure nothing is blocking.

I copied over your code and instead of the middleware used a class that does the same but with an api

public async Task DetectBlockingCode(Func<Task>func)

If thats not possible it would be nice if you could create an internal folder but make all classes in there public so there is no need for copy cat...