[WIP] UGUI ViewModel Binding

Simple reactive View-ViewModel binding system for Unity's UGUI.

Usage:

[ViewModelRoot]
public class MyViewModel : ViewModelRoot
{
    [ViewModelProperty("MyFloat")]
    private PropertyView<float> _myFloatProperty;

    private MyModel _model;
    
    public void Initialize(MyModel model)
    {
        _model = model;
        _model.MyFloat.Subscribe(value => _myFloatProperty.Set(value));
    }
}

TODOs:

• Add attribute for ViewModel properties
• Replace field's name binding with unique name or id
• Setup CI/CD for package