feat: create auth routes

src/routes/auth.routes.tsx

@@ -0,0 +1,15 @@
+import { createNativeStackNavigator } from '@react-navigation/native-stack';
+
+import { SignIn } from '@screens/SignIn';
+import { SignUp } from '@screens/SignUp';
+
+const { Navigator, Screen } = createNativeStackNavigator();
+
+export function AuthRoutes() {
+  return (
+    <Navigator>
+      <Screen name="SignIn" component={SignIn} />
+      <Screen name="SignUp" component={SignUp} />
+    </Navigator>
+  )
+}