fix: nextjs is slow dev server (#364)

* fix: nextjs slow compile time

* fix: change optimized package imports and transpile packages

* fix: format issue

apps/nextjs/src/components/layout/background.tsx

@@ -1,6 +1,5 @@
 import { usePathname } from "next/navigation";
-
-import type { AppShellProps } from "@homarr/ui";
+import type { AppShellProps } from "@mantine/core";
 
 import { useOptionalBoard } from "~/app/[locale]/boards/_context";