Implement a dynamic reconfigure server for updating mesh config parameters

[Sushant-Chavan]

Presently, the task of adding a new mesh model and configuring its parameters such that the model has the right transform and scaling is quite tedious as it requires updating the parameters manually in the model_params.yaml and then restarting the rviz_dataloader node. And iterate this until the model is correctly configured.

This process can be simplified if we have a dynamic reconfigure server with all the required fields to configure a mesh. Once the configuration is complete the changes must also be updated in the model_params.yaml file.