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/system/assets/ui/docs/drag-scroll.md

@@ -0,0 +1,27 @@
+# Drag.Scroll
+
+Allows the elements with `overflow: hidden` to be dragged.
+
+### Example
+
+Drag the area above left-to-right.
+
+    <div id="scrollExample">
+        <div class="scroll-stripes-example"></div>
+    </div>
+
+
+    <style>
+        #scrollExample {
+            width: 100%; height: 50px; overflow: hidden;
+        }
+        .scroll-stripes-example {
+            height: 50px; width: 5000px;
+            background-image: linear-gradient(90deg, gray, white, gray);
+            background-size: 500px 50px;
+        }
+    </style>
+
+    <script>
+        $('#scrollExample').dragScroll();
+    </script>