Function script_runtime_set_asset 

pub fn script_runtime_set_asset(
    runtime: &mut ScriptRuntime,
    name: &str,
    bytes: Vec<u8>,
)

Registers asset bytes a script can reach as a blob under assets.name, for passing to a command like spawn_model. The driver supplies them, bundled or fetched, so a script can spawn a glb without any file access of its own.