URL regex does not fully match every URL

For example:

I would like it to return both google.co and google.com. Sadly, it may be impossible considering the way regular expressions work. Thus, it would be amazing to match the longest string (`pywhat google.com/help` should return `google.com/help`). It is crucial for implementing URL subcategories properly(#51). Btw, URL regex is too long, I do not think that valid TLDs should be checked, so it may be shortened.

Start with pyWhat’s URL regex implementation and inspect issue #51 for the URL subcategory context. Reproduce the examples in the issue, including google.co, google.com, and pywhat google.com/help; done means the matching behavior is covered and the intended longest-match result is verified.

Written by the indexing model from the issue text.