use 'OpenAPI link' to detect relations between entities

[ricfio]

Description
Why do you not use OpenAPI links to detect relations between entities instead of use the current conventions name based?

See:

api-doc-parser/README.md

Line 57 in 895cd81

## OpenAPI Support

In order to reference the resources between themselves (embeddeds or relations), the library guesses embeddeds or references from property names.
For instance if a book schema has a reviews property, the library tries to find a Review resource.
If there is, a relation or an embedded between Book and Review resources is made for the reviews field.
The property name can also be like review_id, reviewId, review_ids or reviewIds for references.

I'm discussing about this possibility on platformatic repository, here:
platformatic/platformatic#446

[alanpoulain]

OpenAPI links is a new feature. Only a few schemas use it (API Platform does not).
But it can be an improvement: if links are used in the schema, do not guess the relations.
It should be an optional config parameter though.