Consider isort as linter

[VitalyFedyunin]

Some of __init__.py imports are getting out of control, we should consider using https://pycqa.github.io/isort/ as hard linter and/or suggestion.

[pmeier]

We recently opted to use ufmt as code formatter. It combines black and usort. AFAIK, isort had some issues on FB architecture. cc @NicolasHug

The final vote is still out, but if we go for it, I can send a PR adopting it here too.

[NicolasHug]

Yes, ufmt was specifically made to match fb's internal arc lint.
If we expect pytorch/data to be modified from withing fbcode from time to time, I think it's much safe to keep fbcode linting and github linting in sync

[ejguan]

Thanks to @pmeier , we have added pre-commit hook to run auto formatter. ufmt is also included to make everything sorted.
Closing this Issue.