[wlgys8]

Summary

• add backend-neutral raycast camera configuration and link-site mounting
• compile MotrixSim raycast cameras and expose semantic depth, ray distance, point, and normal queries
• update MotrixSim dependency to motrixsim-core===0.10.2.dev132022 and remove the standalone motrixsim dependency
• add a headless perception example and focused compiler/read tests
• document reset/FK camera refresh boundaries and remaining lifecycle metadata limitations

Validation

• 42 passed camera configuration/compiler/read tests
• prek run --all-files
• uv lock --check
• git diff --check

Closes #151