Fix lint failure by restoring stdlib/third-party import order in functions.py

[Copilot]

The lint GitHub Actions job was failing on pylint C0411 due to incorrect import grouping/order in adicts/functions.py. This PR aligns the module imports with pylint expectations so the lint check no longer fails on import-order violations.

• Root cause

  • collections.abc.Mapping (stdlib) was placed after numpy imports (third-party), triggering wrong-import-order.

• Code changes

  • Reordered top-level imports in adicts/functions.py to keep stdlib imports before third-party imports.
  • No functional/runtime behavior changes to dictionary operation APIs.

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

import numpy as np
import numpy.typing as npt