pkg_resources deprecated in Python 3.12

[ljlamarche]

h5view breaks in Python 3.12 or later because pkg_resources has been removed from the standard library. The following traceback comes from entering h5view on the command line after installing in a Python 3.13 environment.

Traceback (most recent call last):
  File "/Users/e30737/venvs/py313/bin/h5view", line 5, in <module>
    from h5view import main
  File "/Users/e30737/venvs/py313/lib/python3.13/site-packages/h5view/__init__.py", line 6, in <module>
    import pkg_resources
ModuleNotFoundError: No module named 'pkg_resources'

The pkg_resources docs recommends using importlib instead.

This issue describes the problem in more detail: mu-editor/mu#2485