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/components/UnknownComponent.php

@@ -0,0 +1,34 @@
+<?php namespace Cms\Components;
+
+use Cms\Classes\ComponentBase;
+
+class UnknownComponent extends ComponentBase
+{
+    /**
+     * @var string Error message that is shown with this error component.
+     */
+    protected $errorMessage;
+
+    /**
+     * @inheritDoc
+     */
+    public function __construct($cmsObject, $properties, $errorMessage)
+    {
+        $this->errorMessage = $errorMessage;
+        $this->componentCssClass = 'error-component';
+        $this->inspectorEnabled = false;
+
+        parent::__construct($cmsObject, $properties);
+    }
+
+    /**
+     * @return array
+     */
+    public function componentDetails()
+    {
+        return [
+            'name'        => 'Unknown component',
+            'description' => $this->errorMessage
+        ];
+    }
+}