Make pbars respect logging levels

[nrfulton]

This PR addresses #100 and #101 by disabling pbars in sampling if the logging level is greater than INFO.

I did try logging_redirect_tqdm but it does not address the desired behavior, and in any case we already have show_progress for this purpose.

The main downside of this approach is that logging_level overrides show_progress.

We also use pbars for ollama downloads. I argue against disabling those pbars because in that case the user will observe "hanging" if a model needs to be downloaded. Also, this should happen only rarely and only for local inference users, so the typical situations where you want quiet STDOUT do not apply.