SDF mesh path

[Gregwar]

Currently, using file://, is it the good way?

[lokiledev]

It's not ideal using file:// Another approach would be to use model://robot_name/ so that a ros package can export the package to GAZEBO_MODEL_PATH. It can be done in the package.xml for ros2.

  <export>
    <gazebo_ros gazebo_model_path="${prefix}/simulation/models/"/>
    <gazebo_ros gazebo_media_path="${prefix}/simulation/worlds"/>
  </export>

The folder containing the config.json file here would be under simulation/models

I'll make a PR.