Advent of code

• 2021 was done in Python and setup in a slightly different way.
• 2023 is a different language each day.

Commands below apply to years other than those two years.

Setup a new puzzle to solve in Rust for an existing year:

make year=2022 create

or just the latest year:

make create

Run unit tests for a puzzle:

make year=2022 puzzle=4 test

Run a puzzle:

make year=2020 puzzle=15 run