Support Meta Nougat model

Hi, it would be really fantastic if there was example code to host Nougat inference on candle! Is there any chance of this being supported? The documentation doesn't seem too far off what is provided for say running a BERT model inference session https://huggingface.co/docs/transformers/main/model_doc/nougat.

Start by comparing Candle's existing BERT inference example with the Nougat model documentation linked in the issue. Determine the entry point for adding a Nougat inference example and verify that the example can host Nougat inference as requested; the issue names no specific files or tests.

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