dev: media downloading features

[SoCuul]

Development for the media downloading features

[SoCuul]

Here's the development branch (52f51fa) that I've been having problems with. It was actually with NSURLSession, sorry for the confusion!

I genuinely have zero idea what's causing this to function so weirdly, and I've spent too many hours troubleshooting already lol.

tl;dr:

• The downloadFileWithURL method gets called more than once (for some reason)
• The method sometimes succeeds, but most times errors and leaves the downloading hud on screen

[SoCuul]

Also I just stumbled across https://github.com/EthanArbuckle/simforge wow this actually might fix all my development issues and make working on SCInsta a breeze