loading embeddings

cn2.rs

let embeddings = match embeddings_filename.is_empty() {
    true => {
        println!("no file name provided");
        Tensor::new(&[0.0], &device)?
    }
    false => {
        let tensor_file = safetensors::load(embeddings_filename, &device)?;
        tensor_file
            .get(embeddings_key)
            .expect("error getting key:embedding")
            .clone()
    }
 };