Consider using Hishel or another solution for http caching

[felix-hilden]

Hishel provides HTTP caching for HTTPX. We could use that and delete our custom caching logic (which is likely poorly implemented and won't be up to date)

[felix-hilden]

And rather than use that and introduce a dependency, we could just document the existence of these automatic caches for HTTPX and Requests, and remove the functionality altogether.

[karpetrosyan]

If you decide to use Hishel, I can issue a PR that adds Hishel.

[felix-hilden]

Thank you! I think I'll let it sit for a while, particularly because Hishel is still in early development. But when we do this, I think it'll be just documenting this and removing all the custom functionality rather than using Hishel internally - as I laid out above 👍 Come that time though, I'd be happy to accept a contribution if you're still around. I can ping you if you'd like.