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/Integration/Controllers/TenantIntegrationController.php

@@ -24,9 +24,12 @@ class TenantIntegrationController extends Controller
     public function show(string $tenantCode, string $integrationCode)
     {
         $integration = $this->tenantIntegrationService->getTenantIntegration($tenantCode, $integrationCode);
-        
-        if (!$integration) {
-            return response()->json(['message' => 'Integration not configured for this tenant'], 404);
+
+        if (! $integration) {
+            return response()->json([
+                'code' => 'integration.not_configured',
+                'message' => __('api.integration.not_configured'),
+            ], 404);
         }
 
         return response()->json($integration);
@@ -35,7 +38,7 @@ class TenantIntegrationController extends Controller
     public function store(StoreTenantIntegrationRequest $request, string $tenantCode, string $integrationCode)
     {
         $integration = Integration::where('integration_code', $integrationCode)->firstOrFail();
-        
+
         try {
             $this->tenantIntegrationService->updateOrCreateIntegration(
                 $tenantCode,
@@ -44,11 +47,13 @@ class TenantIntegrationController extends Controller
             );
 
             return response()->json([
-                'message' => 'integration configured correctly',
+                'code' => 'integration.configured',
+                'message' => __('api.integration.configured'),
             ]);
         } catch (\Exception $e) {
             return response()->json([
-                'message' => 'Error validando la configuración: ' . $e->getMessage()
+                'code' => 'integration.validation_failed',
+                'message' => __('api.integration.validation_failed', ['error' => $e->getMessage()]),
             ], 400);
         }
     }