chore: app dir headers re-implementation (#4751)

* chore: header refactor.

* fix: core imports

* chore: refactor profile activity header and fix all other header imports.

* fix: import fixes

* chore: header refactor.

* fix: app dir header reimplementation

* fix: removing parllel headers

* fix: adding route groups to handle pages

* fix: disabling sentry for temp

* chore: update default exports in layouts & headers for consistency.

* fix: bugfixes

* fix: build errors

---------

Co-authored-by: sriram veeraghanta <veeraghanta.sriram@gmail.com>

admin/app/layout.tsx

@@ -16,7 +16,7 @@ import { UserProvider } from "@/lib/user-provider";
 // styles
 import "./globals.css";
 
-function RootLayout({ children }: { children: ReactNode }) {
+export default function RootLayout({ children }: { children: ReactNode }) {
   // themes
   const { resolvedTheme } = useTheme();
 
@@ -44,5 +44,3 @@ function RootLayout({ children }: { children: ReactNode }) {
     </html>
   );
 }
-
-export default RootLayout;