Consider the possibility to raise a property change on the `BindableXXXModel` itself when its `Value` change

[dr1rrb]

What would you like to be added:

Consider the possibility to raise a property change on the BindableXXXModel itself when its Value change.

Why is this needed:

This might allow a binding on the root model and patch common issue when using converter : https://github.com/unoplatform/uno/discussions/17345#discussioncomment-9951598

For which Platform:

TBD

Anything else we need to know?

A workaround is to bind to the BindableXXXModel.Value property.