Implementation of Progress Bars for ART Estimators

[GiulioZizzo]

Currently, many ART estimators and tools do not have progress bars to indicate how quickly they are training, or to display useful information such as loss and accuracy. With ART supporting more complex attacks and models, particularly with the introduction of HF estimators, the training times can be very substantial. Thus having more immediate feedback as to the model performance and expected time to completion for various tasks can be very important for the usability of ART.

We propose a PR to introduce progress bars more widely in the core ART estimators and a few important attacks and defences for ART 1.17