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 :smile: