Ft add pushing - Githubissues

This pull request integrates different examples of object interaction using different robots in different tasks. Specifically:

Non-prehensile pushing[Heijn]: push box or sphere to target with collision avoidance
Non-prehensile pushing[Boxer]: push box with collision avoidance
Non-prehensile pushing[Panda]: push with a stick different objects of different shapes on a table
Whole-body control[Omnipanda]: Pick and deliver to a location of an object on the table

tud-airlab / mppi-isaac