Add ZIP loader

[Matthijsy]

This PR adds a loader for ZIP files, which is mainly useful for ZIP based acquire collects.

I don't have experience with creating loaders, and mainly took the logic from the TarLoader. So if there are things that can be done better would be happy to improve!

fixes #934

[Horofic]

First of all, thanks for you contribution @Matthijsy. I think this is a good first attempt :)!

As you kind of pointed out, the ZIPloader mainly took the logic from the TarLoader with some minor tweaks. I think a better way forward would be to create an AcquireLoader that works on both Zip, Tar and Dir based Acquire collections! Kind of like the VelociraptorLoader found here. Here it does some specific checks to see if a collection is
is a Velociraptor collection.

Let me know what you think about this!

[Horofic]

Could you add tests for this new functionality? This could be done later, if you decide to go on the AcquireLoader route.