Document our GraphQL Enum standards
Document our GraphQL Enum standards

https://gitlab.com/gitlab-org/gitlab-ce/issues/67012

mmkassem/gitlabhq,stoplightio/gitlabhq,stoplightio/gitlabhq,stoplightio/gitlabhq,mmkassem/gitlabhq,mmkassem/gitlabhq,stoplightio/gitlabhq,mmkassem/gitlabhq