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/cms/models/maintenancesetting/_hint.php

@@ -0,0 +1,4 @@
+
+<p>
+    <?= e(trans('cms::lang.maintenance.hint')) ?>
+</p>

modules/cms/models/maintenancesetting/fields.yaml

@@ -0,0 +1,35 @@
+# ===================================
+#  Field Definitions
+# ===================================
+
+fields:
+
+    hint:
+        type: hint
+        path: ~/modules/cms/models/maintenancesetting/_hint.php
+
+    is_enabled:
+        label: cms::lang.maintenance.is_enabled
+        comment: cms::lang.maintenance.is_enabled_comment
+        type: checkbox
+
+    cms_page:
+        type: dropdown
+        cssClass: checkbox-align
+
+    allowed_ips:
+        label: cms::lang.maintenance.allowed_ips.name
+        type: repeater
+        commentAbove: cms::lang.maintenance.allowed_ips.description
+        prompt: cms::lang.maintenance.allowed_ips.prompt
+        cssClass: checkbox-align
+        form:
+            fields:
+                ip:
+                    label: cms::lang.maintenance.allowed_ips.ip
+                    type: text
+                    span: left
+                label:
+                    label: cms::lang.maintenance.allowed_ips.label
+                    type: text
+                    span: right