List valid groups in dev portal

The prompt added in #187 explains the hoops to jump through to get a list of valid groups for `catalog-info.yaml`. It would be nice if this could be simpler, maybe a link to a simple list of valid group names.

Review the prompt added in #187 and how the dev portal handles the `catalog-info.yaml` group lookup. Locate where the current instructions are maintained and define how users will reach a simple list of valid group names. Done means the hoops are replaced or supplemented by an accessible list.

Escrito por el modelo de indexación a partir del texto del issue.