Add detail_info.py

[ltog]

Hi @lonvia

Here is an additional example you can add to your collection. Its a program that reads almost all information there is about differenct OSM objects. It has also got a comment which links to the proper place of the documentation so users who only look at the examples still get a chance to see your fine documentation.

There are 3 open TODOs where I'd be happy if you could fill the blanks.

Best regards and thank you for your work on pyosmium!