Check inputs

new checking mechanism as discussed in SaQC-VC

some files already adapted to new checking.

See also former MR !694 (closed)

FYI: the CI-pipeline fails, because checking already identified some wrong usage in the cookbooks..

saqc/funcs/changepoints.py

@@ -10,7 +10,6 @@ from __future__ import annotations
 import typing
 from typing import TYPE_CHECKING, Callable, Tuple
 
-import numba
 import numpy as np
 import pandas as pd