feat(AppConfig): iterate how apps are managed

- auth clients are always shared, cannot be disabled
- custom connections are enabled by default, can be disabled
- any existing connections can be reconnected regardless of its AppConfig or AppAuthClient states

packages/backend/src/controllers/api/v1/connections/update-connection.test.js

@@ -55,10 +55,9 @@ describe('PATCH /api/v1/connections/:connectionId', () => {
 
     const refetchedCurrentUserConnection = await currentUserConnection.$query();
 
-    const expectedPayload = updateConnectionMock({
-      ...refetchedCurrentUserConnection,
-      reconnectable: refetchedCurrentUserConnection.reconnectable,
-    });
+    const expectedPayload = updateConnectionMock(
+      refetchedCurrentUserConnection
+    );
 
     expect(response.body).toStrictEqual(expectedPayload);
   });