Set up poetry and ruff linting

[abhahn]

Motivation and Context

Adding poetry for dependency and config management; setting up tools for formatting and linting with ruff.

All changes to application files are not intended to be functional changes, just linting / style changes.

Description

Contribution Checklist

• I have built and tested the code locally and in a deployed app
• For frontend changes, I have pulled the latest code from main, built the frontend, and committed all static files.
• This is a change for all users of this app. No code or asset is specific to my use case or my organization.
• I didn't break any existing functionality 😄

[abhahn]

I should probably update a few other scripts as well, just realized this might not actually be complete. I'll take a deeper look at the scripts after discussing the overall approach.