Optionally handle interfaces like abstract classes

[laurensdeb]

Problem description

When running the generator on parameters that implement an interface like below, we noticed that the generator produces errors like error: Unsupported field type TSMethodSignature in Handler. In the --lenient mode this does allow us to generate .jsonld files, but they miss all of the parameters deriving from the interface.

import type { Observable } from 'rxjs';

export interface Handler<T = void, S = void> {

  handle(input: T): Observable<S>;

}

Example code

HandlersJS - Handler.ts

Environment:

    "componentsjs": "5.0.0-beta.4",
    "componentsjs-generator": "3.0.0-beta.7",

[rubensworks]

This issue is actually slightly more complex than I first thought.

Parameters that refer to interfaces are converted into nested record definitions, whereas this is a case where you actually want the param to accept instantiations of components that implement this interface. So we'll probably need a new TSDoc flag for this.

So basically, when this TSDoc flag is enabled on a param, an interface reference would behave just like an abstract class reference.