refactor(App, navigation): migrate to Expo Router and clean up navigation structure

- Updated App entry point to utilize Expo Router, simplifying the navigation setup.
- Removed legacy navigation components and services to streamline the codebase.
- Adjusted package.json to reflect the new entry point and updated dependencies for compatibility.
- Enhanced overall application structure by consolidating navigation logic and improving maintainability.

app/(auth)/_layout.tsx

@@ -0,0 +1,5 @@
+import { Stack } from 'expo-router';
+
+export default function AuthLayout() {
+  return <Stack screenOptions={{ headerShown: false }} />;
+}

app/(auth)/forgot-password.tsx

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+import { ForgotPasswordScreen } from '../../src/screens/auth';
+
+export default function ForgotPasswordRoute() {
+  return <ForgotPasswordScreen />;
+}

app/(auth)/login.tsx

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+import { LoginScreen } from '../../src/screens/auth';
+
+export default function LoginRoute() {
+  return <LoginScreen />;
+}

app/(auth)/register.tsx

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+import { RegisterScreen } from '../../src/screens/auth';
+
+export default function RegisterRoute() {
+  return <RegisterScreen />;
+}