Add timing utilities

[nicoloesch]

Motivation

As a centralised configuration utility, this package is exposed to the entire OMOP stack. We therefore can include timing utilities that could benefit other packages as well.

Pitch

Add timing wrappers that can be just plugged into the code as contextmanagers to get the timing duration of the operation in-between:

@contextmanager
def timing_manager(details):
....


with timing_manager("Details to be listed/printed"):
    # Do operation