feat(api): implement recaptcha v3 anti-spam protection

- Add RecaptchaValidatorInterface and RecaptchaResult entity in Domain
- Create RecaptchaValidationService in Application layer
- Implement GoogleRecaptchaValidator for API integration
- Add recaptcha-settings schema and admin FormBuilder
- Integrate reCAPTCHA validation in NewsletterAjaxHandler
- Integrate reCAPTCHA validation in ContactFormAjaxHandler
- Update FooterRenderer and ContactFormRenderer with reCAPTCHA scripts
- Configure DIContainer with RecaptchaValidationService injection

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

functions.php

@@ -143,15 +143,20 @@ try {
     );
     $adminAjaxHandler->register();
 
+    // Obtener servicio de validacion reCAPTCHA para inyectar en handlers
+    $recaptchaService = $container->getRecaptchaValidationService();
+
     // Crear y registrar el handler AJAX para el Contact Form (público)
     $contactFormAjaxHandler = new \ROITheme\Public\ContactForm\Infrastructure\Api\WordPress\ContactFormAjaxHandler(
-        $container->getComponentSettingsRepository()
+        $container->getComponentSettingsRepository(),
+        $recaptchaService
     );
     $contactFormAjaxHandler->register();
 
     // Crear y registrar el handler AJAX para Newsletter (público)
     $newsletterAjaxHandler = new \ROITheme\Public\Footer\Infrastructure\Api\WordPress\NewsletterAjaxHandler(
-        $container->getComponentSettingsRepository()
+        $container->getComponentSettingsRepository(),
+        $recaptchaService
     );
     $newsletterAjaxHandler->register();
 
@@ -295,9 +300,10 @@ add_action('wp_footer', function() use ($container) {
             visibility: \ROITheme\Shared\Domain\ValueObjects\ComponentVisibility::allDevices()
         );
 
-        // Crear renderer y renderizar modal
+        // Crear renderer y renderizar modal (con soporte reCAPTCHA)
         $cssGenerator = new \ROITheme\Shared\Infrastructure\Services\CSSGeneratorService();
-        $renderer = new \ROITheme\Public\ContactForm\Infrastructure\Ui\ContactFormRenderer($cssGenerator);
+        $recaptchaService = $container->getRecaptchaValidationService();
+        $renderer = new \ROITheme\Public\ContactForm\Infrastructure\Ui\ContactFormRenderer($cssGenerator, $recaptchaService);
 
         // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
         echo $renderer->renderModal($component);