Remove pkg_resources from codebase #271
Description
Current tests raise the following warning
cebra/integrations/sklearn/cebra.py:31
/home/runner/work/CEBRA/CEBRA/cebra/integrations/sklearn/cebra.py:31: UserWarning: pkg_resources is deprecated as an API. See https://setuptools.pypa.io/en/latest/pkg_resources.html. The pkg_resources package is slated for removal as early as 2025-11-30. Refrain from using this package or pin to Setuptools<81.
import pkg_resources
needs to be done before end of November 2025.