Refactor and consolidate store imports (#774)

* Refactor  and consolitdate store imports

- Created a new index file in the core stores directory to export all stores from a single module.
- Updated imports to use consolidated store exports.

* Remove unnecessary import

* Update imports

* Use named exports

* Change store import after merge

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Co-authored-by: philon- <philon-@users.noreply.github.com>

packages/web/src/App.tsx

@@ -6,9 +6,7 @@ import { KeyBackupReminder } from "@components/KeyBackupReminder.tsx";
 import { ErrorPage } from "@components/UI/ErrorPage.tsx";
 import Footer from "@components/UI/Footer.tsx";
 import { useTheme } from "@core/hooks/useTheme.ts";
-import { useAppStore } from "@core/stores/appStore.ts";
-import { useDeviceStore } from "@core/stores/deviceStore.ts";
-import { SidebarProvider } from "@core/stores/sidebarStore.tsx";
+import { SidebarProvider, useAppStore, useDeviceStore } from "@core/stores";
 import { Dashboard } from "@pages/Dashboard/index.tsx";
 import { Outlet } from "@tanstack/react-router";
 import { TanStackRouterDevtools } from "@tanstack/react-router-devtools";