usdc parser doesn`t handle quat arrays.

[NicTanghe]

the .usdc parser only handled scalar quaternions.
PointInstancer orientation data is authored as quat arrays,

orientations are being decoded as a single quat, causing the array lookup return None,
THis causes instance rotations remaining identity.

openusd-rs\src\usdc\parser.rs (+4 -0)

721 +               Type::Quath if value.is_array() => read_pod_vec::<gf::Quath>(&mut cursor)?.into(),