Create more flexible and well defined replacement for list-jobs.

• Print full item names so it can be fed to other CLI commands.
• Print full display names when show-display-names used.
• List items directly contained in View/ItemGroup.
• List all items contained in View/ItemGroup (even indirectly) when called with --recursive.
• --folder x/y --view z/q should list whatever $JENKINS/job/x/job/y/view/z/view/q/ lists. --folder defaults to Jenkins, when --view is not provided all folder items are listed.
• Use --format to display custom item representation.