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/behaviors/relationcontroller/partials/_toolbar.php

@@ -0,0 +1,18 @@
+<div data-control="toolbar">
+
+    <?php foreach ($relationToolbarButtons as $type => $text): ?>
+
+        <?php if ($type === 'update'): ?>
+            <?= $this->relationMakePartial('button_update', [
+                'relationManageId' => $relationViewModel->getKey(),
+                'text' => $text
+            ]) ?>
+        <?php else: ?>
+            <?= $this->relationMakePartial('button_' . $type, [
+                'text' => $text
+            ]) ?>
+        <?php endif ?>
+
+    <?php endforeach ?>
+
+</div>