Ensure shellHooksStore and shellAlertsStore are only created if not a…

…lready defined on the global window object

src/ModuleFederation.tsx

@@ -235,8 +235,13 @@ const createShellAlertsStore = <T extends { shellAlerts: any }>() => {
   };
 };
 
-window.shellHooksStore = createShellHooksStore();
-window.shellAlertsStore = createShellAlertsStore();
+if (!window.shellHooksStore) {
+  window.shellHooksStore = createShellHooksStore();
+}
+
+if (!window.shellAlertsStore) {
+  window.shellAlertsStore = createShellAlertsStore();
+}
 
 export const shellHooksStore = window.shellHooksStore;
 export const shellAlertsStore = window.shellAlertsStore;