XAML and hot reload

[beto-rodriguez]

This is a possible solution for #1823, this PR adds a source generator that creates XAML-friendly objects, this way we can completely build charts only with XAML, this PR does:

1. Creates a source generator that wraps LiveCharts objects into a new object that can be placed in the UI visual tree, this allows to use bindings and styles using the UI framework (Maui, Avalonia, Uno, WPF, WinUI), this should be much intuitive for the developer.
2. Because things are now XAML-friendly, hot reload just works to build charts:

3. We can now completely define the look of the charts in the view, in older versions, when the chart required to customize the look, this had to be defined in the View Model, we can now completely separate the the UI style from the data to plot.