Add support for the Simple API

[shenanigansd]

The discussion in https://discord.com/channels/803025117553754132/803025117995073578/1124057523348062248 reminded me that the legacy JSON API is in fact, legacy, and that I need to work on looking at pulling data via the Simple API.

[flying-sheep]

I need to work on looking at pulling data via the Simple API

Via the simple JSON API ideally, not the simple HTML API.

E.g. check out this code: https://github.com/flying-sheep/PKGBUILDs/blob/fd50db1cfb9296e5aa03525aa4e6dc1b82b4a00d/src/nvcheck/update/sources/pypi.py#L56-L84

It uses the simple JSON API (and has a commented-out block of code doing the same thing with the legacy JSON API. Yes it’s shorter and only needs one request, that’s why the simple JSON API is still called “simple”)