AOC 2023 in Rust

Just learning Rust the best way posible. Trying to improve.

TODO list

• Get rid of update.py script by creating an 'update' command for setup.py (i.e. setup.py update <day>)
• Change every problem.txt to problem.md
• Add an example on how each answer works
• Change days 1 and 2 to keep to the template