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/formcontroller/views/create/fancy/_toolbar.php

@@ -0,0 +1,36 @@
+<div class="form-buttons loading-indicator-container">
+    <button
+        type="submit"
+        data-request="onSave"
+        data-request-data="new:1"
+        data-browser-validate
+        data-hotkey="ctrl+shift+s, cmd+shift+s"
+        data-load-indicator="<?= e(trans('backend::lang.form.creating')); ?>"
+        data-request-before-update="$el.trigger('unchange.oc.changeMonitor')"
+        class="btn btn-primary wn-icon-plus">
+        <?= e(trans('backend::lang.form.create_and_new')); ?>
+    </button>
+    <button
+        type="button"
+        data-request="onSave"
+        data-browser-validate
+        data-hotkey="ctrl+s, cmd+s"
+        data-load-indicator="<?= e(trans('backend::lang.form.creating')); ?>"
+        data-request-before-update="$el.trigger('unchange.oc.changeMonitor')"
+        class="btn btn-primary wn-icon-save">
+        <?= e(trans('backend::lang.form.create')); ?>
+    </button>
+    <button
+        type="button"
+        data-request="onSave"
+        data-browser-validate
+        data-request-data="close:1"
+        data-hotkey="ctrl+enter, cmd+enter"
+        data-load-indicator="<?= e(trans('backend::lang.form.creating')); ?>"
+        data-request-before-update="$el.trigger('unchange.oc.changeMonitor')"
+        class="btn btn-default wn-icon-check">
+        <?= e(trans('backend::lang.form.create_and_close')); ?>
+    </button>
+
+    <a class="btn btn-default wn-icon-ban" href="<?= $this->actionUrl('') ?>"><?= e(trans('backend::lang.form.cancel')); ?></a>
+</div>