basic layout created and welcome onboarding screen implemented

app/_layout.tsx

@@ -7,7 +7,7 @@ import "react-native-reanimated";
 // Prevent the splash screen from auto-hiding before asset loading is complete.
 SplashScreen.preventAutoHideAsync();
 
-export default function RootLayout() {
+const RootLayout = () => {
   const [loaded] = useFonts({
     "Jakarta-Bold": require("../assets/fonts/PlusJakartaSans-Bold.ttf"),
     "Jakarta-ExtraBold": require("../assets/fonts/PlusJakartaSans-ExtraBold.ttf"),
@@ -31,7 +31,10 @@ export default function RootLayout() {
   return (
     <Stack>
       <Stack.Screen name="index" options={{ headerShown: false }} />
-      <Stack.Screen name="+not-found" />
+      <Stack.Screen name="(root)" options={{ headerShown: false }} />
+      <Stack.Screen name="(auth)" options={{ headerShown: false }} />
     </Stack>
   );
-}
+};
+
+export default RootLayout;