Update CI and setup to match latest template

The CI workflows of this repo are stale and don't work anymore. They need to be updated following the conventions/style of the `compas_package_template` cookiecutter template: https://github.com/compas-dev/compas_package_template/tree/main/%7B%7Bcookiecutter.project_folder%7D%7D

This involves updating all the github workflows as well as updating the setup to `pyproject.toml`, etc