Implement Tunnel Discovery for Puzzle Path Planning

extend the examples to also use Puzzle Tunnel Discovery (see https://github.com/xinyazhang/PuzzleTunnelDiscovery / https://xinyazhang.gitlab.io/puzzletunneldiscovery/ )