Add zip file support on non-JVM targets.

[Wavesonics]

Currently it's using Java's Zip file handling under the hood, what would be great is something written in kotlin so it can work on any of the targets.

[swankjesse]

With this, we’re mostly done:
#1439

@Wavesonics need anything beyond FileSystem.openZip() ?

[Wavesonics]

yep I think that does it. and I can traverse the tree in that file system and read and write to it? (just remembered that I don't think the JVM implementation can write to it, so nevermind on that)

and I guess it'll just do de/compression transparently?

[swankjesse]

Yep, it’s read-only currently. We could do read-write though! We’d do that in common code for both platforms.