fix: only generate jsonld docs when docs disabled

[Romaixn]

Q	A
Branch?	3.1
Tickets	Closes #5528
License	MIT

Only generate jsonld docs when docs disabled to avoid routing error when request to /contexts.

[dunglas]

I wonder if we cannot do that in a cleaner way: for instance, we could set docs_formats in the DI Extension to jsonld if enabled_docs is false, so we can simplify the routing part and always register the route, as it will work only for JSON-LD.

Maybe can we do even better now that we have this docs_formats option and deprecate the enable_docs config option, as new system is more powerful and cover this old use case.

WDYT?

[stale]

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