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/mediamanager/partials/_upload-progress.php

@@ -0,0 +1,24 @@
+<div class="layout-row min-size hide" data-control="upload-ui">
+    <div class="layout">
+        <div class="upload-progress">
+            <h5 
+                data-label="file-number-and-progress"
+                data-message-template="<?= e(trans('backend::lang.media.uploading_file_num')) ?> &lt;span&gt;:percents&lt;/span&gt;"
+                data-success-template="<?= e(trans('backend::lang.media.uploading_complete')) ?>"
+                data-error-template="<?= e(trans('backend::lang.media.uploading_error')) ?>"
+            ></h5>
+
+            <div class="progress-controls">
+                <div class="progress">
+                    <div class="progress-bar" role="progressbar" style="width: 0;" data-control="upload-progress-bar">
+                    </div>
+                </div>
+
+                <div class="controls">
+                    <a href="#" data-command="cancel-uploading"><i class="icon-times-circle" title=""></i></a>
+                    <a class="hide" href="#" data-command="close-uploader"><i class="icon-check-circle" title=""></i></a>
+                </div>
+            </div>
+        </div>
+    </div>
+</div>