[OpenAPI] Support top-down consumption of full v3 spec

[shimks]

Story

As a LoopBack4 user, I would like to be able to use my OpenAPI spec to scaffold a LoopBack4 application

Acceptance Criteria

TBD

[shenghu]

@shimks will loopback 4 support openapi 3 initially in later release?

[shimks]

@shenghu It is going to be supported in the later releases. We are currently hashing out the plans for the degree for its support

[jannyHou]

Hi @shenghu thank you for being interested in this feature, we have a spike story for it #739, and will keep updating our plan in the comment.

[bajtos]

I think this is a duplicate of #725, what do you think @jannyHou and @kjdelisle ?

[jannyHou]

hmm...yeah looks like #725 was created earlier and contains more details :-p

[dhmlau]

in that case, can we close it as dup of #725?

[shenghu]

#725 doesn't indicate to support openapi 3. Although we still call swagger 2.0, etc. But the whole swagger spec is renamed as OpenAPI. I'm fine #725 can cover this requirement. Just hope this can be support as early as possible.

[bajtos]

Closing in favor of #1882.