Ability to attach files formed from bytes

[akahan]

Example:

    let params = SendDocumentParams::builder()
        .chat_id(chat_id.to_string())
        .document(("Bytes".to_string(), bytes.to_vec()))
        .caption("Send bytes example")
        .build();

    frankenstein::AsyncApi::new(token).send_document(&params).await.unwrap();