venv install: missing setuptools dependency

[hrehfeld]

Traceback (most recent call last):
  File "/home/hrehfeld/projects/ext/python-uniteai/.venv/bin/uniteai_llm", line 5, in <module>
    from uniteai.llm_server import main
  File "/home/hrehfeld/projects/ext/python-uniteai/.venv/lib/python3.12/site-packages/uniteai/llm_server.py", line 54, in <module>
    from uniteai.config import load_config
  File "/home/hrehfeld/projects/ext/python-uniteai/.venv/lib/python3.12/site-packages/uniteai/config.py", line 33, in <module>
    import pkg_resources
ModuleNotFoundError: No module named 'pkg_resources'

pip install setuptools fixes that.