[Feature]: collapsible CodeBlock for long codes

[JounQin]

What problem does this feature solve?

https://docs.redhat.com/en/documentation/openshift_container_platform/4.20/html/postinstallation_configuration/configuring-private-cluster

What does the proposed API look like?

{
  "codeBlock": {
    "collapsible": {
      "minLines": 5,
      "displayLines": 3
    }
  }
}