[Feature request] - update python packaging

[shimwell]

I've been looking through a few F4E repos recently and I see most have setup.py or setup.cfg files. I noticed this one also has a partial pyproject.toml file. We could move these setup files entirely to pyproject.toml files to keep up to date with the latest python packaging recommendations

• https://packaging.python.org/en/latest/guides/modernize-setup-py-project/#modernize-setup-py-project
• https://packaging.python.org/en/latest/tutorials/packaging-projects/

While updating we could also move to a src/jade layout instead of the jade folder structure. The version could be moved to the pyprojects and we could make use of import importlib.metadata to make the jade.__version__ attribute or if we are really keen then we could make use of the setuptools_scm to track the version for us.

Describe the solution you'd like

• pyproject.toml instead of setup.py + setup.cfg
• src/jade instead of jade folder structure
• importlib.metadata or setuptools_scm to get version number

Describe alternatives you've considered could also leave things as they are

Additional context while setup.py is not depreciated the command commonly associated with a setup.py file python setup.py install is now depreciated and pyproject.toml is "strongly recommened" for python packaging