Add VBD solver schema

[andrewkaufman]

Is this a new feature, an improvement, or a change to existing functionality?

New Feature

Feature Description

Newton's VBD solver is important for cable & cloth simulation. We should expose relevant solver parameters on a dedicated NewtonVBDSceneAPI schema

Additional context or alternatives

No response

Code of Conduct

• I agree to follow newton-usd-schemas Code of Conduct
• I have searched the open issues and have found no duplicates