Merge branch 'feature/user-group' into dev

docker/ory/keto/namespaces.ts

@@ -22,8 +22,8 @@ class UserGroup implements Namespace {
 
 class Tenant implements Namespace {
   related: {
-    admins: User[]
-    members: User[]
+    admins: (User | SubjectSet<UserGroup, "members">)[]
+    members: (User | SubjectSet<UserGroup, "members">)[]
     parent: Tenant[]
     parent_group: TenantGroup[]
   }