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/twig/Engine.php

@@ -0,0 +1,40 @@
+<?php namespace System\Twig;
+
+use System\Twig\Loader as TwigLoader;
+use Twig\Environment as TwigEnvironment;
+use Illuminate\Contracts\View\Engine as EngineInterface;
+
+/**
+ * View engine used by the system, used for converting .htm files to twig.
+ *
+ * @package winter\wn-system-module
+ * @author Alexey Bobkov, Samuel Georges
+ */
+class Engine implements EngineInterface
+{
+    /**
+     * @var TwigEnvironment
+     */
+    protected $environment;
+
+    /**
+     * Constructor
+     */
+    public function __construct(TwigEnvironment $environment)
+    {
+        $this->environment = $environment;
+    }
+
+    public function get($path, array $vars = [])
+    {
+        $previousAllow = TwigLoader::$allowInclude;
+
+        TwigLoader::$allowInclude = true;
+
+        $template = $this->environment->load($path);
+
+        TwigLoader::$allowInclude = $previousAllow;
+
+        return $template->render($vars);
+    }
+}