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/Menu/Requests/StoreTenantMenuRequest.php

@@ -23,7 +23,7 @@ class StoreTenantMenuRequest extends FormRequest
 
         if (! $this->menuModel) {
             throw ValidationException::withMessages([
-                'menu_code' => 'El menú indicado no existe.',
+                'menu_code' => __('api.menu.not_found'),
             ]);
         }
     }