updating to use clerk auth with new routing to signin page by default

app/(auth)/_layout.tsx

@@ -0,0 +1,12 @@
+import { useAuth } from '@clerk/clerk-expo'
+import { Redirect, Stack } from 'expo-router'
+
+export default function AuthRoutesLayout() {
+    const { isSignedIn } = useAuth()
+
+    if (isSignedIn) {
+        return <Redirect href={'/'} />
+    }
+
+    return <Stack screenOptions={{ headerShown: false }} />
+}