[DOCS] RobotImporter tutorial

[jhanca-robotecai]

Describe the issue briefly

There is a website with documentation about Robot Importer feature in the Robotics section, but there is no sample tutorial on importing a robot with some more advanced features. Such a tutorial can be found in ROSConDemo repository, but it is seriously outdated due to multiple changes in the RobotImporter over the last year.

Which page(s) / section(s) are affected?

There are no tutorials related to Robotics yet.

Does this work have an engineering dependency? What is it?

This tutorial from ROSConDemo repository will be removed in https://github.com/o3de/ROSConDemo/pull/272, as it is seriously outdated. Moreover, it is very difficult to find such tutorials in the demo repositories and such tutorials should rather be kept in the documentation website.