feat(ui-task-zipper): new option additionalDirectories

[erlethor]

Additional Directories in Zip File

This is a sample folder that should be copied with all content into the zip
file using builder task ui5-task-zipper using the configuration property
additionalDirectories

Below is an example configuration:

builder:
  customTasks:
    - name: ui5-task-zipper
      afterTask: generateVersionInfo
      configuration:
        debug: true
        archiveName: "customZipName"
        additionalDirectories:
          - testDir