This PR adds a [Inference Handler](https://huggingface.co/docs/inference-endpoints/guides/custom_handler) to this model.
This is required for using it in a HuggingFace Dedicated Endpoint, since this product does not has a Image-To-Text task available out-of-the-box.
The handler implements the inference as described in the (model docs)[https://huggingface.co/docs/transformers/model_doc/nougat] but with the StoppingCriteria implemented on the notebook example.
