[rewrite] Updated frontend structure and played with custom routes

frontend/src/routes/(errors)/404.lazy.tsx

@@ -1,6 +1,6 @@
-import { createLazyFileRoute } from '@tanstack/react-router'
-import NotFoundError from '@/features/errors/not-found-error'
+import { createLazyFileRoute } from "@tanstack/react-router";
+import NotFoundError from "@/pages/errors/not-found-error";
 
-export const Route = createLazyFileRoute('/(errors)/404')({
-  component: NotFoundError,
-})
+export const Route = createLazyFileRoute("/(errors)/404")({
+	component: NotFoundError
+});