(ada-python): add pathlibs Path object style as opposed to os-like style.

[Rykarix]

Hey folks

I was going through your docs here: https://ada-url.readthedocs.io/en/latest/ and couldn't help but think it would be cool if the URL class had support for Path-like "notation" (from pathlib import Path)

For example, instead of having to do this:

from ada_url import join_url
base_url = 'http://a/b/c/d;p?q'
join_url(base_url, '../g')

This could be handled simply by the base class:

from ada_url import URL

base_url = URL("http://example.com")
about_url = base_url / "about"

The output of about_url should be: http://example.com/about, the class itself handles the compliance based consistencies & things like stripping / joining of "/" strings etc

Just like pathlibs Path obejects.

This could probably also be extended by allowing queries, searches and other api-like url structures to be handled by other operators "&" and "|" for eg

This also get's people used to the idea of working with a URL object, which is typically more helpful when encouraging people to conform to some kind of compliance as it lends itself better to more pythonic code & easier typing

[anonrig]

Sounds like a good idea. We can support both of them.

[bbayles]

Here is a branch to test out.