Reusable nested MatchConfigs

In the OpenApi spec for the well-known Kubernetes kinds there are reusable components that can be referenced via $ref.

Instead of duplicating parts of MatchConfigs for each kind, we could refer to components.

For example (removing the long names to keep it brief), Pod kind has PodSpec as a component. StatefulSet and Deployment (among others) refer back to PodSpec. As would some CRDs.

# io.k8s.api.core.v1.Pod
properties:
  spec:
    allOf:
      - $ref: '#/components/schemas/io.k8s.api.core.v1.PodSpec'
    default: {}

# ...and the component it points at, defined once:
io.k8s.api.core.v1.PodSpec:
  properties:
    containers:
      type: array
      x-kubernetes-list-type: map
      x-kubernetes-list-map-keys: [name]
      items:
        allOf:
          - $ref: '#/components/schemas/io.k8s.api.core.v1.Container'

Find a way to drop hints for reusable parts. Needs a little investigation.