Add first example for using Aries in the pick-and-place demo

[sebastianstock]

No description provided.

[alexander-sung]

The tables_demo already works with the Aries planner. To test it explicitly, you would need to edit https://github.com/DFKI-NI/mobipick_labs/blob/noetic/tables_demo_planning/src/tables_demo_planning/demo_domain.py#L208 and specify name="aries" instead of problem_kind=problem.kind because there is no parameter on the bridge to choose the planner by name. Is this intended by this issue? On the other hand, you would automatically execute such a first example if Aries is the only planner installed.

Currently, Aries does not return a plan for the much easier pick-and-place demo for me. It's probably related to our recent discussion with the planner's authors - so out of scope of this issue.