Iris: Move to new project structure

[Hialus]

Motivation

We want to migrate Iris to a new Python project structure with more and better tooling.

Description

• Moved the dependencies from a simple requirements file to using poetry
• Added more tooling than flake8 and black
  • PyLint -> Linter with different checks than flake8
  • MyPy -> Enforce static typing
  • iSort -> To keep the imports consistent
  • Bandit -> Check for common code smells and security issues
  • detect-secrets -> Prevents you from accidentally pushing secrets
  • Prettier -> Formatting some non-python files
• Expanded the pre-commit config to include the linters and some additional smaller checks

TODOs

• Fix the current PyLint issues: https://confluence.ase.in.tum.de/spaces/ArTEMiS/pages/249039492/PyLint+issues
• Adjust the development setup in the README
• Fix the current MyPy issues - To be done step by step in future PRs
• Add PyTest tests - To be done step by step in future PRs

[bensofficial]

The code changes, especially moving the files and formatting some files, look reasonable.