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/form/partials/_field_email.php

@@ -0,0 +1,30 @@
+<!-- Email -->
+<div class="input-group static">
+    <span class="input-group-addon">
+        <i class="empty wn-icon-envelope"></i>
+    </span>
+    <?php if ($this->previewMode): ?>
+        <?php if ($field->value): ?>
+            <a
+                href="mailto:<?= e($field->value) ?>"
+                target="_blank"
+                rel="noopener noreferrer"
+                class="form-control"
+            >
+                <?= e($field->value) ?>
+            </a>
+        <?php else: ?>
+            <span class="form-control">&nbsp;</span>
+        <?php endif ?>
+    <?php else: ?>
+        <input
+            type="email"
+            name="<?= $field->getName() ?>"
+            id="<?= $field->getId() ?>"
+            value="<?= e($field->value) ?>"
+            placeholder="<?= e(trans($field->placeholder)) ?>"
+            class="form-control"
+            <?= $field->getAttributes() ?>
+        />
+    <?php endif ?>
+</div>