[DDF] Specification or link to what is exactly an ActiveDocs would be great. As chapter about it appears in the future

Specification or link to what is exactly an ActiveDocs would be great. As chapter about it appears in the future sections, specifically in the Developer Portal section (https://access.redhat.com/documentation/en-us/red_hat_3scale_api_management/2.13/html/providing_apis_in_the_developer_portal/adding-activedocs-to-threescale_creating-a-new-service-based-on-oas#doc-wrapper). Same as below.

Reported by: rh-ee-averevki

https://access.redhat.com/documentation/en-us/red_hat_3scale_api_management/2.13/html/operating_3scale/threescale-automation-webhooks#annotations:7e221705-d9f4-4582-832e-b18a4fdf46bb