I am composing a robot that consists of several independent parts (for example, a robot hand mounted on an arm).
So far, my "assembly" procedure has been a mix of two approaches:
1. Create a single xacro file that includes other xacro files (for each robot), and define a link between them. This results in a single `/robot_description` parameter
2. Load two robots into their own namespaces (e.g., `arm/robot_description` and `hand/robot_description`), then define a transform using `static_transform_publisher`.
What is considered the best style for doing a complex assemblage of robots? Note that here I'm talking about linking multiple components into a single robot, not multiple independent robots.
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