Multi-robot environment support

[dosssman]

Hello @vikashplus

Thanks a lot to you and the team for putting together this collection of robotics learning environment.

I got that you plan to eventually support multi-robot / multi-agent environments in the paper, but is there any reference / documentation or resource you could share about what would be required to get a multi-robot version of FrankaReach-v0 for example ?

Thank you for your time.