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/widgets/MediaManager.php

@@ -0,0 +1,26 @@
+<?php namespace Cms\Widgets;
+
+use Backend\Widgets\MediaManager as BackendMediaManager;
+
+/**
+ * Media Manager widget.
+ *
+ * @package winter\wn-cms-module
+ * @author Alexey Bobkov, Samuel Georges
+ * @deprecated Use Backend\Widgets\MediaManager. Remove if year >= 2020.
+ */
+class MediaManager extends BackendMediaManager
+{
+    /**
+     * Constructor.
+     */
+    public function __construct()
+    {
+        traceLog('Widget Cms\Widgets\MediaManager has been deprecated, use ' . BackendMediaManager::class . ' instead.');
+
+        $this->assetPath = '/modules/backend/widgets/mediamanager/assets';
+        $this->viewPath = base_path('/modules/backend/widgets/mediamanager/partials');
+
+        parent::__construct(...func_get_args());
+    }
+}