Bump to MuJoCo 3.4.0

[yinhang-oai]

Summary of Changes

• Bumped MuJoCo dependency to 3.4.0
• Regenerated Rust bindings from updated C headers
• Updated wrappers to reflect API, type, and layout changes introduced in 3.4.0

Version & Documentation

• Crate version bumped: 0.2.0 → 0.3.0
• README updated to reference MuJoCo 3.4.0

Vendored Headers

• Vendored MuJoCo C headers updated to 3.4.0

  • Includes core headers such as mujoco.h, mjmodel.h, mjdata.h, mjvisualize.h, and related files

Rust Bindings

• Rust bindings regenerated using the 3.4.0 headers
• bindgen output updated accordingly

Wrapper & API Updates

Spec Deletion API

• Deletion API updated to use mjs_delete(spec, element)
• mjs_detachBody and mjs_detachDefault now delegate to mjs_delete
• mjs_delete wrapper now requires &mut mjSpec

Sparse Data Layout Changes

• Sparse structures moved from mjData to mjModel
• Removed sparse slices from mjData
• Added sparse accessors on mjModel
• Added mjData helper methods that delegate to mjModel

Type & Size Updates

• Updated size-related types to match 3.4.0 (mjtSize)
• Updated fields include narena, nbuffer, and maxuse_*
• Newly exposed size field: noct

Options Changes

• Removed apirate
• Added sleep_tolerance

Signature Alignment

• Ray casting wrappers updated to match the new 3.4.0 array-pointer signatures

References

• MuJoCo changelog:
  https://mujoco.readthedocs.io/en/latest/changelog.html#changelog

[kanarus]

Oh nice! Thank!