jupyter-ai: Python 3.12 not supported

Description

Attempting to install Jupyter AI on Python 3.12 is not supported, even though our recipe on conda-forge merely stipulates python >=3.8.

The following error occurs when running pip install jupyter_ai with Python 3.12 on macOS 13.6.3 on an Apple Silicon processor:

...
Using cached yarl-1.9.4-cp312-cp312-macosx_11_0_arm64.whl (79 kB)
Building wheels for collected packages: faiss-cpu
  Building wheel for faiss-cpu (pyproject.toml) ... error
  error: subprocess-exited-with-error
  
  × Building wheel for faiss-cpu (pyproject.toml) did not run successfully.
  │ exit code: 1
  ╰─> [12 lines of output]
      running bdist_wheel
      running build
      running build_py
      running build_ext
      building 'faiss._swigfaiss' extension
      swigging faiss/faiss/python/swigfaiss.i to faiss/faiss/python/swigfaiss_wrap.cpp
      swig -python -c++ -Doverride= -I/usr/local/include -Ifaiss -doxygen -module swigfaiss -o faiss/faiss/python/swigfaiss_wrap.cpp faiss/faiss/python/swigfaiss.i
      Traceback (most recent call last):
        File "/opt/miniconda3/envs/jupyter-ai-jl4-pip/bin/swig", line 5, in <module>
          from swig import swig
      ModuleNotFoundError: No module named 'swig'
      error: command '/opt/miniconda3/envs/jupyter-ai-jl4-pip/bin/swig' failed with exit code 1
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for faiss-cpu
Failed to build faiss-cpu
ERROR: Could not build wheels for faiss-cpu, which is required to install pyproject.toml-based projects

See also https://github.com/kyamagu/faiss-wheels/issues/87 for the lack of Python 3.12 wheels for faiss-cpu.