Add Dual UR5 Husky

[robotlearning123]

If you would like to see a new model added to the Menagerie collection, please provide us with the following information before sending a pull request. (Ideally, before you start working on converting or tuning the model for MuJoCo.)

URL for the existing model source (e.g. URDF)
https://github.com/DualUR5Husky/husky
https://github.com/wangcongrobot/dual_ur5_husky_mujoco

License terms of the upstream model
BSD 3-Clause

What do you think is required to convert and tune this model for MuJoCo?
I covert this model for MuJoCo several years before, but maybe need to tune the model based on mujoco_menagerie.

Are you proposing to help develop and maintain the new model?
Yes.