Add support for opening IPA files

[upintheairsheep]

Please add support for opening IPA files directly, using the 7zip or a normal zip engine to extract it and run it.

[hikari-no-yume]

Ah, yeah, it'd be good to do this at some point! I think someone familiar with Rust can probably figure out how to do it by modifying fs.rs to use a zip file library, and return some type like Box<dyn Read + Write + Seek + …> instead of File. Some small changes in main.rs and bundle.rs would be needed too.

[hikari-no-yume]

Though if anyone does attempt this: please try to pick a ZIP file library that doesn't have tons of dependencies. Keeping the number of dependencies low is a somewhat arbitrary goal but it's a principle I stick to.

[DCNick3]

Sounds fun, I'll try to tackle it

[hikari-no-yume]

@DCNick3 kindly contributed support for this in https://github.com/hikari-no-yume/touchHLE/pull/34, merged in 32d12cc697f8fc62770962b8d5a1fee44dfba677. This will be in the next release. :)