[Feature request] Make enable to specify caller location

[wonderful-panda]

PAssertExtension was removed at d435d5d.

My recommendation is that this class becomes a code snippet
that anyone can add to their own test library if they want the syntactic sugar

I understand what you mean.
But when I write it in my own library, PAssert can't detect TestClass and caller location correctly.

So, I want to add optional argument location to each APIs.

use case:

public static void Should<T>(this T target, Expression<Func<T, bool>> expression)
{
    var f = new StackTrace(0, true).GetFrame(1);
    var location = new CallerLocation(f);
    PAssert.IsTrue(target, expression, location: location);
}