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/console/scaffold/controller/controller.stub

@@ -0,0 +1,54 @@
+<?php
+
+namespace {{ plugin_namespace }}\Controllers;
+
+use Backend\Classes\Controller;
+use Backend\Facades\BackendMenu;
+
+/**
+ * {{ title_name }} Backend Controller
+ */
+class {{ studly_name }} extends Controller
+{
+    /**
+     * @var array Behaviors that are implemented by this controller.
+     */
+    public $implement = [
+        \Backend\Behaviors\FormController::class,
+        \Backend\Behaviors\ListController::class,
+    ];
+
+    /**
+     * @var array Permissions required to view this page.
+     */
+    protected $requiredPermissions = [
+        '{{ lower_author }}.{{ lower_plugin }}.{{ lower_name }}.manage_all',
+    ];
+{% if sidebar %}
+
+    /**
+     * @var string The form layout to use. One of standard, sidebar, fancy
+     */
+    protected $formLayout = 'sidebar';
+{% if stubs %}
+
+    /**
+     * @var string Classes to be added to the body element
+     */
+    public $bodyClass = 'compact-container';
+{% endif -%}
+{% elseif fancy %}
+
+    /**
+     * @var string The form layout to use. One of standard, sidebar, fancy
+     */
+    protected $formLayout = 'fancy';
+{% if stubs %}
+
+    /**
+     * @var string Classes to be added to the body element
+     */
+    public $bodyClass = 'fancy-layout compact-container breadcrumb-flush breadcrumb-fancy';
+{% endif -%}
+{% endif -%}
+}