e1992e62d7
This change adds an Emscripten binding for loading binary MuJoCo models (`.mjb`) from the virtual filesystem. The new binding, `mj_loadBinary`, takes a filename and an `MjVFS` object, enabling the loading of models that reference assets within the VFS. PiperOrigin-RevId: 859740455 Change-Id: I9f9d8bbba0b57422e2356867e4282a1b04566475