Add build support for python 3.13 and 3.14

[hfoote]

In Python 3.13 and 3.14, astropy needs additional dependencies from setuptools. See error message from CI below:

` File "astropy/wcs/setup_package.py", line 13, in
from setuptools.dep_util import newer_group
ModuleNotFoundError: No module named 'setuptools.dep_util'

  hint: This error likely indicates that `astropy@5.3.4` depends
  on `setuptools.dep_util`, but doesn't declare it as a build
  dependency. If `astropy` is a first-party package, consider adding
  `setuptools.dep_util` to its `build-system.requires`. Otherwise, either
  add it to your `pyproject.toml` under:

  [tool.uv.extra-build-dependencies]
  astropy = ["setuptools.dep_util"]

  or `uv pip install setuptools.dep_util` into the environment and re-run
  with `--no-build-isolation`.

help: astropy (v5.3.4) was included because snapanalysis (v0.1.0)
depends on astropy
Error: Process completed with exit code 1.`

We should install these extra dependencies into the project environment to add support for python versions 3.13 and 3.14.