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/Layout.php

@@ -0,0 +1,51 @@
+<?php namespace Cms\Classes;
+
+/**
+ * The CMS layout class.
+ *
+ * @package winter\wn-cms-module
+ * @author Alexey Bobkov, Samuel Georges
+ */
+class Layout extends CmsCompoundObject
+{
+    /**
+     * Fallback layout name.
+     */
+    const FALLBACK_FILE_NAME = 'fallback';
+
+    /**
+     * @var string The container name associated with the model, eg: pages.
+     */
+    protected $dirName = 'layouts';
+
+    /**
+     * Initializes the fallback layout.
+     * @param \Cms\Classes\Theme $theme Specifies a theme the file belongs to.
+     * @return \Cms\Classes\Layout
+     */
+    public static function initFallback($theme)
+    {
+        $obj = self::inTheme($theme);
+        $obj->markup = '{% page %}';
+        $obj->fileName = self::FALLBACK_FILE_NAME;
+        return $obj;
+    }
+
+    /**
+     * Returns true if the layout is a fallback layout
+     * @return boolean
+     */
+    public function isFallBack()
+    {
+        return $this->fileName === self::FALLBACK_FILE_NAME;
+    }
+
+    /**
+     * Returns name of a PHP class to us a parent for the PHP class created for the object's PHP section.
+     * @return mixed Returns the class name or null.
+     */
+    public function getCodeClassParent()
+    {
+        return LayoutCode::class;
+    }
+}