feat: backend-supplied id cards on profile page

feat: SCIdCard thing

backend/backend/config/f-u/backendrc.js

@@ -70,6 +70,10 @@ const config = {
           authProvider: 'paia',
           url: 'https://hds.hebis.de/paia/core',
         },
+        /** TODO: idCards: {
+          authProvider: 'default',
+          url: 'TODO',
+        } */
       },
     },
     aboutPages,