Support Python 3.12

[hello-binit]

With .python_version set to 3.12, the following error:

$ uv run test_one_process.py
Using CPython 3.12.8
Removed virtual environment at: .venv
Creating virtual environment at: .venv
  × Failed to build `numpy==1.23.3`
  ├─▶ The build backend returned an error
  ╰─▶ Call to `setuptools.build_meta:__legacy__.build_wheel` failed (exit status: 1)

      [stderr]
      Traceback (most recent call last):
        File "<string>", line 8, in <module>
        File "/home/hello-binit/.cache/uv/builds-v0/.tmpz2TXTm/lib/python3.12/site-packages/setuptools/__init__.py", line 10, in <module>
          import distutils.core
      ModuleNotFoundError: No module named 'distutils'

      hint: `distutils` was removed from the standard library in Python 3.12. Consider adding a constraint (like `numpy >1.23.3`) to avoid building a version of `numpy` that depends on `distutils`.
  help: `numpy` (v1.23.3) was included because `stretch-mujoco` (v0.0.1) depends on `urchin` (v0.0.29) which depends on `numpy`