Decorator or feature flag to bundle merge "allOf" schemas

Is your feature request related to a problem? Please describe.

Let's say I have these schemas:

schemas:
  Car:
    allOf: 
      - $ref: #/components/schemas/Make
      - $ref: #/components/schemas/Model
      - type: object
        properties:
          manufacturedAt:
             type: string
             format: date
          color:
             type: string
  Make:
    type: object
    properties:
       make:
           type: string
           enum: 
              - Batmobile
              - DeLorean
  Model:
    type: object
    properties:
       model:
           type: string

And now, I have an application (not Redocly), that needs to consume this schema and operate on it. The application struggles with the allOf. I wish to have a resulting merged schema like the following to make it easier for third party programs to use:

Car:
  type: object
  properties:
     make: ...
     model: ...
     manufacturedAt: ...
     color: ...

Describe the solution you'd like

1. A flag on the bundle command like --merge-all-of.
2. A decorator that can be included in a redocly.yaml file like merge-all-of.

Describe alternatives you've considered

Requesting third party libs have better allOf support. 🤣

Additional context

None

Start by examining the bundle command and the redocly.yaml decorator configuration mentioned in the issue. Determine how merging referenced allOf schemas should handle the shown properties and references, then verify that both the --merge-all-of flag and merge-all-of decorator produce the requested flattened schema.