Migrate away from pkg_resources

[Pandapip1]

Describe the bug

Brainflow uses pkg_resources, a deprecated API.

To Reproduce

>>> import brainflow
/nix/store/i079mpji8v9k1sv2j5cgx1gg9f26vxzr-python3.13-brainflow-5.19.0/lib/python3.13/site-packages/brainflow/board_shim.py:10: 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

Info (please complete the following information):

• Board Id: N/A
• OS running on your PC: NixOwOS 25.11 (Xantusia) x86_64
• Programming Language and its version: python
• Architecture(x86, x64, ARM, etc): x86_64
• In case of Python full output of pip list command, for other languages please provide BrainFlow version used: Nix is used, pip is not installed. Version used is 5.19.0.

Expected behavior

pkg_resources is migrated away from and replaced with importlib.

Screenshots

N.A.

Additional context

N.A.