The development environment setup procedure is outdated.

#### Describe requests The development environment setup procedure is outdated. For example, > Use poetry shell to spawn a subshell. `poetry shell` is a plugin option in poetry >= 2.0.0 > Type make to run all tests and linters, or run pytest, black, flake8, isort, and mypy individually. This project is using ruff instead of black, flake8, and isort now.