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/layouts/_breadcrumb.php

@@ -0,0 +1,22 @@
+<?php
+$menu = \Backend\Facades\BackendMenu::getActiveMainMenuItem();
+$context = \Backend\Facades\BackendMenu::getContext();
+$sideMenu = $menu->sideMenu[$context->sideMenuCode ?? null] ?? null;
+$settingsManager = \System\Classes\SettingsManager::instance();
+$settingsContext = $settingsManager->getContext();
+$settingsItem = null;
+if ($settingsContext) {
+    $settingsItem = $settingsManager->findSettingItem($settingsContext->owner, $settingsContext->itemCode);
+}
+?>
+<?php if ($menu): ?>
+<ul>
+    <li><a href="<?= $menu->url ?>"><?= e(trans($menu->label)) ?></a></li>
+    <?php if ($sideMenu && $sideMenu->url !== $menu->url): ?>
+        <li><a href="<?= $sideMenu->url ?>"><?= e(trans($sideMenu->label)) ?></a></li>
+    <?php elseif ($settingsItem): ?>
+        <li><a href="<?= $settingsItem->url ?>"><?= e(trans($settingsItem->label)) ?></a></li>
+    <?php endif; ?>
+    <li><?= e(trans($this->pageTitle)) ?></li>
+</ul>
+<?php endif; ?>