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-value.md

@@ -0,0 +1,52 @@
+# Drag.Value
+
+Allows the dragging of elements that result in a custom value when dropped.
+
+    <p>
+        <input placeholder="Drag a button below to me" class="form-control" />
+    </p>
+
+    <button
+        class="btn btn-default"
+        data-control="dragvalue"
+        data-text-value="Winter">
+        Drop "Foo"
+    </button>
+
+    <button
+        class="btn btn-default"
+        data-control="dragvalue"
+        data-text-value="CMS">
+        Drop "Bar"
+    </button>
+
+### Clickable
+
+You can make elements clickable from another input by defining `data-drag-click="true"`.
+
+    <p>
+        <input placeholder="Click on me first, then click a label below" class="form-control" />
+    </p>
+
+    <div class="control-balloon-selector">
+        <ul>
+            <li
+                data-control="dragvalue"
+                data-text-value="Richie"
+                data-drag-click="true">
+                Monday
+            </li>
+            <li
+                data-control="dragvalue"
+                data-text-value="Potsie"
+                data-drag-click="true">
+                Tuesday
+            </li>
+            <li
+                data-control="dragvalue"
+                data-text-value="The Fonz"
+                data-drag-click="true">
+                Happy days!
+            </li>
+        </ul>
+    </div>