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/reportwidget/widget.stub

@@ -0,0 +1,9 @@
+<div class="report-widget">
+    <h3><?= e($this->property('title')) ?></h3>
+
+    <?php if (!isset($error)): ?>
+        <p>This is the default partial content.</p>
+    <?php else: ?>
+        <p class="flash-message static warning"><?= e($error) ?></p>
+    <?php endif ?>
+</div>