[Docs] Ray plugin documentation missing details

[davidmirror-ops]

Description

To ensure the example is reproducible, the following elements are missing:

1. Make imports visible in the docs page, not only in the flytesnacks repo
2. How to set up the ClusterRole with the permissions to create rayjobs. Otherwise the example throws an error. This could be part of the plugin setup guide

cannot create resource "rayjobs" in API group "ray.io" in the namespace "flytesnacks-development

In particular, the ClusterRole is missing the following permissions:

rbac:
  extraRules:
    - apiGroups:
      - "ray.io"
      resources:
      - rayjobs
      verbs:
      - create
      - get
      - list
      - patch
      - update
      - delete

Are you sure this issue hasn't been raised already?

• [X] Yes

Have you read the Code of Conduct?

• [X] Yes