Added umbrella header to allow for including the framework in playgrounds

[ghost]

see these links for some details
https://forums.swift.org/t/recent-swiftpm-features-and-enhancements/13807
https://forums.swift.org/t/cant-experiment-swiftnio-in-playground/15020/6

[ffried]

Generally looks good. Only small warning to fix. 🙂

[ffried]

An #import "crypt.h" is missing here.
Compiling also warns about it:

<module-includes>:1:1: warning: umbrella header for module 'Minizip' does not include header 'crypt.h'
#include "/Zip/Zip/minizip/include/Minizip.h"
^

[ghost]

Hey Florian, I addressed that warning, but in the process came across a few more things worth addressing.
Most notably, I overwrote the project with the results of swift package generate-xcodeproj because the project wasn't building via Xcode due to the removal of the module.modulemap file.
This may endanger the desirability of the original SPM support PR back into the root marmelroy/Zip repo, so you may want to reconsider my PR.
I've made the changes in a series of commits so you may want to cherry-pick whichever bits you like.
¡Thanks for the feedback!

[ffried]

@CalQL8ed-K-OS Yea, overwriting the Xcode project isn't a good idea for non-SPM projects. 🙂
I'll check if I can manually integrate your changes. Maybe I can just tell SPM to ignore the module map.

[ffried]

@CalQL8ed-K-OS So, I've finally found time to look at your changes again and integrate them in my branch.
Like I mentioned, we can't re-generate the Xcode Project with SPM, since this would break non-SPM projects. But I've nevertheless managed to get rid of (or actually move) the module.modulemap file.

Could you maybe check if this now works with playgrounds?

I'll close this PR since its main feature should be integrated in the branch now.

[ghost]

@CalQL8ed-K-OS So, I've finally found time to look at your changes again and integrate them in my branch.
Like I mentioned, we can't re-generate the Xcode Project with SPM, since this would break non-SPM projects. But I've nevertheless managed to get rid of (or actually move) the module.modulemap file.

Could you maybe check if this now works with playgrounds?

I'll close this PR since its main feature should be integrated in the branch now.

I've created a new PR, #2, which adds a playground and demonstrates that this branch does indeed work with playgrounds now.
FYI This playground was created using John Sundell's Playground CLI Tool, specifically the command was playground -t Zip.playground -d ./Zip.xcodeproj