Implemention of URL in C++

[XadillaX]

I've written the C++ version of WHATWG URL and passed all the WPT of 3 May, 2022 (Living Standard — Last Updated 3 May 2022) and already used in our own Web-interoperable Runtime. And I initially commit the C++ code in xadillax/libwhatwgurl. The lib and binding directories are the code of Node.js binding demos.

I think we can continue working on this.

[jasnell]

It's always great seeing new implementations for folks to use but this community group is not focused on the individual implementations of the various specs so this really isn't on topic here.