Make Foundation BOOLEAN more user-friendly

[AArnott]

Discussed in #584

^{Originally posted by Slion June 15, 2022}
HidD_GetProductString return value is generated as that Foundation.BOOLEAN class. Is there an elegant way to check its value? I tried getting TRUE and FALSE to generate but I don't think that works.

I ended up declaring something like that, still somewhat ugly though:

namespace Windows.Win32
{
    class K
    {
        public static readonly Foundation.BOOLEAN TRUE = new Foundation.BOOLEAN(1);
        public static readonly Foundation.BOOLEAN FALSE = new Foundation.BOOLEAN(0);
    }
}

We have both BOOL and BOOLEAN types (of different lengths) in the metadata. We already take steps in CsWin32 to make BOOL feel as much like bool as possible. We can do the same for BOOLEAN.