Add Poetry, requirements, formatters and linters

[antibagr]

Hi there! I really enjoyed the course and I'd love to make some contributions. Here's what I propose:

• Include requirements files for pip users.
• Add a poetry installation file.
• Introduce a Makefile for contributors.
• Ensure code compliance by running black and isort.
• Make minor adjustments to ensure flake8 is satisfied.
• Update the "Installation" section in README.md accordingly.

I realize these might not be exactly what the project requires, or it might not need anything additional. But, I believe in setting a good example for potential junior teammates down the line!

[antibagr]

@jasmcaus, any updates on that?