feat: integrate with MailJet API for newsletter registration

config/packages/twig.yaml

@@ -1,6 +1,8 @@
 twig:
     file_name_pattern: '*.twig'
     form_themes: ['forms.html.twig']
+    paths:
+        '%kernel.project_dir%/assets/images': images
     globals:
         htmx_change_trigger: 'change delay:100ms'
         website_base_url: '%env(APP_WEBSITE_BASE_URL)%'