Notebook progress support

[jeromekelleher]

Should be as simple as

from tqdm.auto import tqdm

Will need to check how well it works across both.

Should wait until we've abstracted out the "scan" bit to use the standard parallel worker pattern

[tomwhite]

Just wanted to say I've been using Rich progress bars recently in another project, which I've found to be easier to work with than tqdm.

[jeromekelleher]

I've been wanting to play with Rich for a while, could be fun. Looks like the dependencies aren't too bad

I'd be open to switching to Rich if it gives us an overall nicer experience on the CLI

[tomwhite]

It looks nicer too I think. BTW pip uses Rich for its progress bars.

[jeromekelleher]

I had a play in #64 and it is very nice @tomwhite. Unfortunately it doesn't work as well as tqdm for our usage - I opened issue #65 to note the problems.