Support for MacOS

[abdalimran]

I was trying to use Reranker in my macos machine. I tried to install the package using uv add "rerankers[monovlm]" but got the below error.
I looks like the package has a dependency on flash-attn which is not supported in macos.

Resolved 156 packages in 527ms
  × Failed to build `flash-attn==2.8.3`
  ├─▶ 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 14, in <module>
        File "/Users/imran/.cache/uv/builds-v0/.tmpZ97s55/lib/python3.12/site-packages/setuptools/build_meta.py", line 331, in get_requires_for_build_wheel
          return self._get_build_requires(config_settings, requirements=[])
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/Users/imran/.cache/uv/builds-v0/.tmpZ97s55/lib/python3.12/site-packages/setuptools/build_meta.py", line 301, in _get_build_requires
          self.run_setup()
        File "/Users/imran/.cache/uv/builds-v0/.tmpZ97s55/lib/python3.12/site-packages/setuptools/build_meta.py", line 512, in run_setup
          super().run_setup(setup_script=setup_script)
        File "/Users/imran/.cache/uv/builds-v0/.tmpZ97s55/lib/python3.12/site-packages/setuptools/build_meta.py", line 317, in run_setup
          exec(code, locals())
        File "<string>", line 22, in <module>
      ModuleNotFoundError: No module named 'torch'

      hint: This error likely indicates that `flash-attn@2.8.3` depends on `torch`, but doesn't declare it as a build dependency. If `flash-attn` is a
      first-party package, consider adding `torch` to its `build-system.requires`. Otherwise, either add it to your `pyproject.toml` under:

      [tool.uv.extra-build-dependencies]
      flash-attn = ["torch"]

      or `uv pip install torch` into the environment and re-run with `--no-build-isolation`.
  help: If you want to add the package regardless of the failed resolution, provide the `--frozen` flag to skip locking and syncing.

I've tried force install the package ignoring the flash-attn dependency. But then when I ran the below code, I realized that macos's gpu mps is also not supported.

from rerankers import Reranker

ranker = Reranker("monovlm", device="mps")

Do you have any plan to make this package work on MacOS?

Thanks!