[FEATURE] Support for agents of different types

[fellowchrononaut]

Would love to be able to simulate scenarios with multiple agents of different types.

Example scenario:
Collaborative exploration using Ground Robot and Drones Simultaneously

Something like this PR for airsim #4340

Is this feature part of any of the future development goals?

[JimP303]

That capability is on the roadmap although we don't have a firm date yet. GRID will support multiple homogenous robots, but not different modalities yet.