Documentation on UDS Core groups and access levels

[rjferguson21]

Is your feature request related to a problem? Please describe.

UDS Core deploys a Keycloak instance with a pre-configured UDS, the realm currently contains two groups, Auditor and Admin, which dictates access level for various applications in UDS Core. There is no documentation to indicate what access these groups give, nor any hints for configuring external identity providers to leverage those groups.

Describe the solution you'd like

A document outlining what groups that are pre-created and what permissions they grant users within each configured SSO application.

Perhaps some kind of table with the existing groups and the roles/groups they map to in the respective applications. Where appropriate link out to the applications to indicate what level of access will be given.

For example, we configure Grafana to map our Keycloak groups to corresponding Grafana roles.

Additional context

This document might also could be referenced to indicate how one might map IDP groups to Keycloak groups.