Script to get date_time.countries

Script to obtain a tuple/list of dictionary entries representing countries: with ISO 3166-1 alpha-2 code, English country name, and a list of (commonly used) timezones per country. As obtained from (latest) `pytz`, which needs to be locally installed using `pip install pytz` in development environment.

It doesn't get the `continent` nor `capital` portions seen in current `faker/providers/date_time.py` countries, but these are probably not used anyway.