Retire in favour of loguru

[kreczko]

The functionality of this package (easy setup, two log levels, rich formatting) is already very thin.
Stumbled across a package that can be used as a better replacement with more support:
https://loguru.readthedocs.io/en/stable/overview.html

Before archiving this package:

• add instructions on how to move to loguru
• add examples for TRACE (already present) and TIMING log levels;