Improve output of ec inspect policy-data

[lcarva]

Currently, the command displays the data as is:

🐚 ec inspect policy-data --source github.com/release-engineering/rhtap-ec-policy//data -o yaml | yq . | head
pipeline-required-tasks:
  docker:
    - effective_on: "2024-06-17T00:00:00Z"
      tasks:
        - - buildah
          - buildah-10gb
          - buildah-6gb
          - buildah-8gb
          - buildah-remote
          - buildah-oci-ta
...

It would be great if it also provided some description for what each rule data value represents and how it is used.