Model download enhanced feedback

[rsxdalv]

Currently model downloads are only visible on the command line.
This should be supplemented with -
gr.info or similar, could be integrated in @model_manager decorator to make the changes easier.

[rsxdalv]

The newest extension - chatterbox - uses a gr.Progress to better indicate that a model is loading within the UI.
The next step is to also indicate when it is specifically downloading not just loading in general.