Fix Python 3.12 compat: pkg_resources -> importlib

[tonyseek]

Traceback (most recent call last):
  File ".../bin/lice", line 8, in <module>
    sys.exit(main())
             ^^^^^^
  File ".../lib/python3.12/site-packages/lice/__init__.py", line 5, in main
    from lice.core import main
  File ".../lib/python3.12/site-packages/lice/core.py", line 1, in <module>
    from pkg_resources import (resource_stream, resource_listdir)
ModuleNotFoundError: No module named 'pkg_resources'

[tonyseek]

Hi @jcarbaugh,

It seems the lice is broken on Python 3.12 because of incompatible changes. Could you review this patch which may fix it?

--
Jiangge Zhang