See context: https://github.com/kiegroup/kogito-runtimes/pull/1443#discussion_r679650603

We need to keep a "smart " list of add-ons available in our repository. This list will group all the add-ons that can be used by users in their projects.

Such a list can then be used by developers tooling. For instance, to validate if an add-on exists and it's available in our repository. Quarkus has a similar approach by keeping the extensions in YAML files.

"Public" add-ons would have a descriptor YAML file with some information about it such as name, description, artifactId, and etc. Then this meta-descriptor file would group them all.