Support interfacing spdlog with Python's logging stdlib

[robomics]

To see log messages issued by hictkpy (and hictk!), users should do something like:

import hictkpy
import logging

logging.basicConfig(level="INFO", force=True)
logging.getLogger().setLevel("INFO")

# Do stuff with hictk
# ....

hictkpy's logger is simply called hictkpy, and can be fetch with e.g. logging.getLogger("hictkpy").