Go "Enums" are not generated with godoc into cluster_spec.md

[nicmorales9]

What happened?

In cluster_spec.md lots of helpful information is generated from struct information, however, the docgen is not setup to generate helpful information for Go "enums" such as processGroupConditionType, which does not have the values geneated for it, e.g. https://github.com/FoundationDB/fdb-kubernetes-operator/blob/main/docs/cluster_spec.md#processgroupconditiontype
It would be fantastic if the docgen code in cmd/po-docgen/api.go was extended to allow this information to get documented too, as currently users have to grep the codebase for the variables.

What did you expect to happen?

I expect all the values in cluster_spec.md to have helpful information about the possible options in a tabular form like for the structs that are autogenerated.

How can we reproduce it (as minimally and precisely as possible)?

N/A

Anything else we need to know?

No response

FDB Kubernetes operator

N/A

Kubernetes version

N/A

Cloud provider

N/A