Add ruff, pyproject formatting

[tonyfast]

woof. rough. ruff added a few lines of code to my shit. didn't really like my format. hopefully, y'all dig it.

there is now a formatting step in the workflow.

[github-actions[bot]]

A preview fo the exported examples will be rendered at https://iota-school.github.io/notebooks-for-all/branch/add-formatting/exports/html