Implement localization for API responses and error messages

- Added localization support for API responses in English and Spanish.
- Introduced a middleware to set the API locale based on the Accept-Language header.
- Updated various exception messages and validation responses to use localized strings.
- Created new language files for English and Spanish translations.
- Refactored existing code to replace hardcoded messages with localized strings.
- Added tests to verify localization functionality and response correctness.

app/Domains/Auth/Controllers/LoginController.php

@@ -28,7 +28,7 @@ class LoginController extends Controller
 
         if (! $user || ! Hash::check($credentials['password'], $user->password)) {
             throw ValidationException::withMessages([
-                'email' => 'Email o Contraseña incorrectos.',
+                'email' => __('api.auth.invalid_credentials'),
             ]);
         }
 
@@ -50,7 +50,8 @@ class LoginController extends Controller
         );
 
         $response = response()->json([
-            'message' => 'Sesion iniciada correctamente.',
+            'code' => 'auth.login_success',
+            'message' => __('api.auth.login_success'),
             'token' => $token,
             'token_type' => 'Bearer',
             'user' => UserResource::make($user),