Fails under Python 3.12+

[stephenjfox]

Due to the setuptools-dependency being removed you can't work with this template under Python 3.12 or 3.13.

Simple steps to reproduce

1. Make test directory
2. Virtual install Python 3.13 under that directory (e.g. dir/.venv/)
3. Attempt pip install -e . after activating the environment

Migrating away from setuptools will be harder because of their related lack of migration support away from pkg_resources, but c'est la vie. Would be happy to contribute if that's welcome

[jph00]

Seems to be working now.