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/formwidgets/markdowneditor/partials/_markdowneditor.php

@@ -0,0 +1,37 @@
+<?php if ($this->previewMode): ?>
+    <div class="form-control"><?= Markdown::parse(e($value)) ?></div>
+<?php else: ?>
+    <div
+        id="<?= $this->getId() ?>"
+        class="
+            field-markdowneditor
+            size-<?= $size ?>
+            <?php if ($stretch): ?>
+                layout-relative stretch
+            <?php endif ?>
+            <?php if ($readOnly || $disabled): ?>
+                disabled
+            <?php endif ?>
+        "
+        data-control="markdowneditor"
+        data-refresh-handler="<?= $this->getEventHandler('onRefresh') ?>"
+        data-view-mode="<?= $mode ?>"
+        <?php if ($useMediaManager): ?>
+            data-use-media-manager="true"
+        <?php endif ?>
+        data-vendor-path="<?= Url::asset('/modules/backend/assets/vendor/ace') ?>"
+        <?php if ($readOnly || $disabled): ?>
+            data-disabled="true"
+        <?php endif; ?>
+        <?= $this->formField->getAttributes() ?>>
+
+        <div class="control-toolbar editor-toolbar"></div>
+
+        <div class="editor-write layout-cell">
+            <textarea name="<?= $name ?>" id="<?= $this->getId('textarea') ?>"><?= e($value) ?></textarea>
+        </div>
+
+        <div class="editor-preview layout-cell"></div>
+
+    </div>
+<?php endif ?>