ModelHubMixin: Fix attributes lost in inheritance

[Wauplin]

Fix #2300.

Instead of recreating the MixinInfo object, we should complete its information as mentioned by @qubvel. Thanks for reporting this!

EDIT: made some minor edits to ModelCardData as well but mostly setting alphabetical order + adding license_name/license_link officially.

EDIT 2: deprecated languages in favor of language to be consistent with ModelCardData.

[HuggingFaceDocBuilderDev]

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[qubvel]

@Wauplin thanks for a quick response and fix!

[qubvel]

Great fix, just nit comments

[qubvel]

Should we extend tags instead of overriding them? In that case, it would be impossible to drop base model tags and set new ones. Probably there is no the best solution, but I would expect them to be replaced rather than extended 🙂 WDYT?

Suggested change

	if info.model_card_data.tags is not None:
	info.model_card_data.tags.extend(tags)
	else:
	info.model_card_data.tags = tags
	info.model_card_data.tags = tags

[Wauplin]

I would prefer to extend them actually, specifically so that we don't loose tags defined by base models. Worst case, users can overwrite the internal attribute 😕
TBH I don't think this will ever be a problem, multiple inheritance when using ModelHubMixin is already not common so cases where nested classes define tags and where these tags should not be inherited might just never happen.

[qubvel]

Make sense, thank you!

[LysandreJik]

Looks good to me! Why are we switching from languages to language if we expect it to still be a list?

EDIT: Ah, to be consistent with ModelCardData

[Wauplin]

EDIT: Ah, to be consistent with ModelCardData

Yes, and moreover to be consistent with the existing repos on the Hub (and typically to filter by language).

Thanks for the review :)