[New] cs.show_env() to show environment

[lisphilar]

Summary of this new feature

New function .show_env() will show the environement, including covsirphy version, its dependencies' version, Python version, platform information.

Inspilation: pandas.show_versions()

CovsirPhy version I used: 2.27.0

[lisphilar]

Show currently install versions of target library and its dependencies:

from importlib.metadata import distribution, requires
from pprint import pprint

target = "covsirphy"
dependencies = [target] + [r[:r.find(" (")] for r in requires(target)]
versions = [distribution(dep).version for dep in dependencies]
pprint({k: v for (k, v) in zip(dependencies, versions)}, sort_dicts=False)

[lisphilar]

Python version and OS:

import platform
platform.python_version()
platform.platform()

[lisphilar]

After completion, this method will be explained in YAML issue templates. #1232