Tetheria/add aero hand open

[Nan-Tetheria]

Description

This PR introduces the official Tetheria Aero Hand Open, a tendon-driven robotic hand model for MuJoCo manipulation tasks.

The model features accurate cable-driven actuation with spatial tendons, pulleys, and springs that reflect the real hand’s mechanical design.

Fixes:
Fix adding model issue #208

Checklist

Please check off each item ([x]) once complete, or mark it as [N/A] if it doesn't apply:

• Added your name to CONTRIBUTORS.md (alphabetically by first name)
• Updated CHANGELOG.md:
  • [N/A] Global changelog (if your change affects the overall repo)
  • Model-specific changelog (if it affects a specific model only)
• Followed the XML formatting/style guidelines (if editing MJCF)
• Ran pytest test/ locally and ensured all tests pass
• Signed the Contributor License Agreement (CLA)

Refer to the contributing guide if you're unsure about any of the steps.

[Nan-Tetheria]

Hi @kevinzakka

Just a gentle reminder about our PR. As you probably have known, this model will be directly referenced by our upcoming PR in mujoco_playground, so it would be great if it could be reviewed or merged soon to keep the integration consistent across both repositories.

Please let us know if there’s anything we can clarify or adjust to help speed up the review process. Thanks again for your time and all the great work maintaining the Menagerie repo!

Nan

[btaba]

I'm not authorized to merge this unfortunately

[Nan-Tetheria]

I'm not authorized to merge this unfortunately

I'm not authorized to merge this unfortunately

@btaba Thank you for pushing this forward! Appreciate it.

I accidentally closed and reopened this PR just now, but there are no new changes. The review is still valid, but the workflow now requires maintainer approval to run. Could you please approve and run the workflow? Thanks!