Notes for self:

• Set up environment with uv install.
• Use an invocation like uv run ptw . year2023/day01 to re-run tests on file changes.
• Run the top-level script with python3 -m year2023.day01 <./year2023/day01/input.
• Use aoc-cli to interact with the website:
  • Download an input file with e.g. aoc download -I --input-file ./year2023/day01/input.