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/widgets/search/partials/_search.php

@@ -0,0 +1,23 @@
+<div class="loading-indicator-container size-input-text">
+    <input
+        placeholder="<?= $placeholder ?>"
+        type="text"
+        name="<?= $this->getName() ?>"
+        value="<?= e($value) ?>"
+        data-request="<?= $this->getEventHandler('onSubmit') ?>"
+        data-request-complete="if($(this).val().length) {$(this).next().show()} else {$(this).next().hide()};"
+        <?= !$searchOnEnter ? 'data-track-input' : '' ?>
+        data-load-indicator
+        data-load-indicator-opaque
+        class="form-control <?= $cssClasses ?>"
+        autocomplete="off" />
+    <button
+        class="clear-input-text"
+        type="button"
+        value=""
+        style="<?= empty($value) ? 'display: none;' : ''; ?>"
+        onclick="$(this).prev().val('');$(this).prev().request();"
+    >
+        <i class="icon-times"></i>
+    </button>
+</div>