Add Ruff for linting and formatting

[svengt]

Currently, the codebase uses 2-space indentation, which differs from PEP 8's recommended 4 spaces. This occasionally leads to inconsistencies in pull requests where contributors accidentally use 4 spaces instead of 2.

Benefits of adding Ruff:

• Automated formatting ensures consistent code style across all contributions
• Fast and comprehensive linting catches common issues early
• Single tool for both formatting and linting, simplifying the toolchain
• Significantly faster than alternatives like Black + Flake8 + isort

Common issues it would prevent:

• Inconsistent indentation between files
• Unused imports and variables
• Potential bugs that static analysis can catch
• Style inconsistencies in pull requests

I'm happy to help implement this if there's interest.

[BrandonShar]

I'd definitely be interested in merging this if you're willing to set it up!