Add helper to generate an eval result `model-index`, with proper typing (#382)
* Fix typo + consistency
* code generated by jtd-codegen
* Simplify generated code for now, only keep interfaces
* metadata_eval_result: helper to generate an eval result `model-index`, with proper typing
* Style
Co-authored-by: Lysandre Debut <lysandre@huggingface.co>
Co-authored-by: Lysandre Debut <lysandre.debut@reseau.eseo.fr>