Add first draft of a Nexus zipper utility

examples/nexus-zipper/.gitignore

examples/nexus-zipper/.vscode/launch.json

examples/nexus-zipper/.vscode/settings.json

examples/nexus-zipper/.vscode/tasks.json

examples/nexus-zipper/createGitTag.sh

examples/nexus-zipper/dscanner.ini

examples/nexus-zipper/dub.json

examples/nexus-zipper/dub.selections.json

examples/nexus-zipper/source/app.d

examples/nexus-zipper/source/appZipper.d

examples/nexus-zipper/source/logging.d