feat: VivesPOS landing on Winter CMS 1.2 — theme + plugin + Dockerfile

- Base: wintercms/winter branch 1.2 (full framework)
- Theme vivespos: Canvas 7 + Bootstrap 5 CDN, custom CSS
- Layout: deferred GTM/GA4 tracking, JSON-LD SoftwareApplication
- Partials: hero (offline-first), features, modes (offline/nube toggle),
  screenshots, pricing (3 planes), comparison, FAQ, CTA
- Plugin VivesPOS.Site with ContactForm
- Dockerfile: PHP 8.2 Apache, port 80, healthcheck
- Added winter/wn-pages, blog, sitemap, seo plugins
- Active theme set to vivespos

modules/backend/models/usergroup/fields.yaml

@@ -0,0 +1,24 @@
+# ===================================
+#  Field Definitions
+# ===================================
+
+fields:
+    is_new_user_default:
+        label: backend::lang.user.group.is_new_user_default_field_label
+        comment: backend::lang.user.group.is_new_user_default_field_comment
+        type: switch
+
+    name:
+        label: backend::lang.user.group.name_field
+        commentAbove: backend::lang.user.group.name_comment
+        span: auto
+
+    code:
+        label: backend::lang.user.group.code_field
+        commentAbove: backend::lang.user.group.code_comment
+        span: auto
+
+    description:
+        label: backend::lang.user.group.description_field
+        type: textarea
+        size: tiny