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/backend/facades/BackendAuth.php

@@ -0,0 +1,27 @@
+<?php namespace Backend\Facades;
+
+use Winter\Storm\Support\Facade;
+
+/**
+ * @method static void registerCallback(callable $callback)
+ * @method static void registerPermissions(string $owner, array $definitions)
+ * @method static void removePermission(string $owner, string $code)
+ * @method static array listPermissions()
+ * @method static array listTabbedPermissions()
+ * @method static array listPermissionsForRole(string $role, bool $includeOrphans = true)
+ * @method static boolean hasPermissionsForRole(string $role)
+ *
+ * @see \Backend\Classes\AuthManager
+ */
+class BackendAuth extends Facade
+{
+    /**
+     * Get the registered name of the component.
+     *
+     * @return string
+     */
+    protected static function getFacadeAccessor()
+    {
+        return 'backend.auth';
+    }
+}