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/assets/js/mediamanager-browser.js

@@ -0,0 +1,12 @@
+/*
+ * This is a bundle file, you can compile this by running
+ *
+ *     php artisan winter:util compile assets
+ *
+ * @see build-min.js
+ *
+
+=require mediamanager.js
+=require mediamanager.imagecroppopup.js
+
+*/