Tutorial for humanoid path planner platform.

This package provides some tutorials to learn how to use Humanoid Path Planner software. The various tutorials are:

1. tutorial 1 How to install and run the software.
2. tutorial 2 How to define and solve a simple pick and place problem.
3. tutorial 3 How to use HPP in manufacturing.
4. tutorial 4 How to control the trajectory of a tool.
5. tutorial 5 How to optimize and time-parameterize paths.
6. tutorial 6 How to use the rviz2 vizualization.
7. tutorial 7 How to execute motions on a simulated robot.
8. tutorial 8 Pick and place with gripper, introducing pre and post-actions.
9. tutorial 9 A more efficient way to assign pre or post-actions.