- auto-format code with:
  + autoflake => * remove unused imports and variables
                 * remove duplicate dict keys
                 * expand star imports
  + black => enforce an uncompromising code style
  + isort => enforce a consistent import style
             compliant with Google's Python style guide
- add nox session "format" to run these tools

- base configuration for all nox sessions to come
- add infos about nox in the README file
- ignore [py]cache folders in git

- describe how a local develop environment can be set up
- we use poetry to manage the project
  => add pyproject.toml and poetry.lock files
- add a package for the source code
  => "src" layout structure to ensure that pytest runs the tests
     against a packaged version installed in a virtual environment
     and not the *.py files in the project directory
     (Source: https://hynek.me/articles/testing-packaging/)
- ignore poetry's artifacts in git

- describe the project's goals
- contributions are welcome
- mention the GitFlow branching model