[TIMOB-24099] Windows: Mix WinRT APIs with Titanium APIs

Mix and match Hyperloop WinRT APIs and Titanium APIs together. For instance calling Titanium APIs from a native event callback, or calling Native APIs inside a callback registered with Titanium APIs. Also, we might want to mix and match Titanium.UI.View and its subclasses with any WinRT API expecting a Windows.UI.Xaml.UIElement.

var win = Ti.UI.createWindow({}),
    TextBlock = require('Windows.UI.Xaml.Controls.TextBlock'),
    text = new TextBlock();

text.Text = "Hello, world!";

win.add(text);
win.open();