Fix pylint import-order violation in adicts/functions.py

[Copilot]

The lint GitHub Actions job failed due to a pylint wrong-import-order violation in adicts/functions.py. This PR applies a minimal, targeted fix to restore compliance with the repository’s lint rules.

• Root cause

  • collections.abc.Mapping (stdlib) was placed after third-party imports (numpy, numpy.typing), which violates pylint import ordering.

• Code change

  • Reordered imports in adicts/functions.py so standard-library imports are grouped before third-party imports.
  • No functional logic changes to dictionary operation implementations.

• Resulting import layout

from typing import TypeVar, Callable
from collections.abc import Mapping

import numpy as np
import numpy.typing as npt