Missing setuptools dependency for python 3.13+

[jonesetc]

Describe the issue:

Python no longer bundles setuptools, so there is an implicit dependency on a package that might be missing, especially if running in a virtualenv.

Minimal Complete Verifiable Example:

python -m venv demo
source demo/bin/activate
pip install dask-glm==0.3.2

import dask_glm

Traceback (most recent call last):
  File "<python-input-0>", line 1, in <module>
    import dask_glm
  File "/.../demo/lib/python3.13/site-packages/dask_glm/__init__.py", line 1, in <module>
    from pkg_resources import DistributionNotFound, get_distribution
ModuleNotFoundError: No module named 'pkg_resources'

Anything else we need to know?:

The workaround showing this is the issue, which still issues a UserWarning, but that is a separate issue.

pip install setuptools==80.9.0

import dask_glm

/.../demo/lib/python3.13/site-packages/dask_glm/__init__.py:1: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81.
  from pkg_resources import DistributionNotFound, get_distribution

Environment:

• Dask version: dask-glm==0.3.2
• Python version: 3.13
• Operating System: MacOS
• Install method (conda, pip, source): pip