Sort imports with isort

[mjspeck]

Is your feature request related to a problem? Please describe.
Imports are unstandardized, adding friction to outside developers contributing.

Describe the solution you'd like
Add in support for isort including a pre-commit hook, and configuration in pyproject.toml. This will not only sort imports, but ensure that all future imports are sorted according to the same specification.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.

Tasks

Beta Give feedback

1. add isort configuration and dev dependency to pyproject.toml
2. add isort to pre-commit-config.yaml
3. add isort check to ci pipeline
4. sort imports once all configuration is done

[silvanocerza]

We reverted PR #5933 with #5980 as isort and black were conflicting.
Reopening.

[wochinge]

Btw, there black / isort compatibility here: https://pycqa.github.io/isort/docs/configuration/black_compatibility.html

Anyway, I enabled checking for the right sorting using ruff here: #7207