text: Title: How to generate a onxx and a nms  file ?
  Body: ### Search before asking
  
  - [x] I have searched the Ultralytics YOLO [issues](https://github.com/ultralytics/ultralytics/issues) and [discussions](https://github.com/orgs/ultralytics/discussions) and found no similar questions.
  
  
  ### Question
  
  from ultralytics import YOLO
  
  # Load a model
  model = YOLO("maskbest-ptbr.pt")  # load an official model
  
  # Export the model
  model.export(format="onnx",nms=True)
  
  ### Additional
  
  i am need a nms-model.onxx for boxes and so on. How i can create these file 