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/classes/MediaLibraryItem.php

@@ -0,0 +1,19 @@
+<?php namespace Cms\Classes;
+
+use System\Classes\MediaLibraryItem as SystemMediaLibraryItem;
+
+/**
+ * Represents a file or folder in the Media Library.
+ *
+ * @package winter\wn-cms-module
+ * @author Alexey Bobkov, Samuel Georges
+ * @deprecated Use System\Classes\MediaLibraryItem. Remove if year >= 2020.
+ */
+class MediaLibraryItem extends SystemMediaLibraryItem
+{
+    public function __construct()
+    {
+        traceLog('Class Cms\Classes\MediaLibraryItem has been deprecated, use ' . SystemMediaLibraryItem::class . ' instead.');
+        parent::__construct(...func_get_args());
+    }
+}