missing pyproject.toml

[Newtoniano]

The pyproject.toml file is missing, and it's breaking poetry install. Also it would be great if you could double-check that the environment installs correctly from scratch these days, and using what version of python exactly, as I've had more than a few issues trying to install gym 0.21.0 for example (the fix is to have setuptools==66.0.0 and wheel==0.38.4 installed beforehand).