Move --python and --python-version into the "Python options" help

[zanieb]

Part of #4454

e.g. for uv help pip compile

Python options:
      --python <PYTHON>
          The Python interpreter against which to compile the requirements.
          
          By default, uv uses the virtual environment in the current working directory or any parent
          directory, falling back to searching for a Python executable in `PATH`. The `--python`
          option allows you to specify a different interpreter.
          
          Supported formats:
          - `3.10` looks for an installed Python 3.10 using `py --list-paths` on Windows, or
            `python3.10` on Linux and macOS.
          - `python3.10` or `python.exe` looks for a binary with the given name in `PATH`.
          - `/home/ferris/.local/bin/python3.10` uses the exact Python at the given path.

  -p, --python-version <PYTHON_VERSION>
          The minimum Python version that should be supported by the resolved requirements (e.g., `3.8` or `3.8.17`).
          
          If a patch version is omitted, the minimum patch version is assumed. For example, `3.8` is mapped to `3.8.0`.

      --python-preference <PYTHON_PREFERENCE>
          Whether to prefer using Python installations that are already present on the system, or those that are downloaded and installed by uv

          Possible values:
          - only-managed: Only use managed Python installations; never use system Python installations
          - managed:      Prefer managed Python installations over system Python installations
          - system:       Prefer system Python installations over managed Python installations
          - only-system:  Only use system Python installations; never use managed Python installations

      --python-fetch <PYTHON_FETCH>
          Whether to automatically download Python when required

          Possible values:
          - automatic: Automatically fetch managed Python installations when needed
          - manual:    Do not automatically fetch managed Python installations; require explicit installation

[zanieb]

cc @eth3lbert

[eth3lbert]

LGTM 👍

Not a blocker, should we add some snapshots for these commands?

[zanieb]

I don't feel strongly. The snapshots are going to be kind of annoying to update and it's not really critical? Not sure.

[zanieb]

Thanks for reviewing :)