Provide a way to quickly print the SDK versions

[hmelder]

When opening an issue related to the Windows SDK, it might be useful to have a command which prints out the versions of all subcomponents (libobjc2, libffi, libcurl, gnustep-make, etc.)

[hmelder]

objcfetch (homage to neofetch)

[triplef]

Good idea. tools-android does something along these lines where it writes a build.txt containing the commit hashes of all projects that were build. I never got around of doing something similar here mainly because of everything being more difficult in Batch...

[hmelder]

everything being more difficult in Batch...

Well, then let's write it in {Objective-}C ^^