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/system/assets/js/snowboard/snowboard.extras.js

@@ -0,0 +1,25 @@
+import Flash from './extras/Flash';
+import FlashListener from './extras/FlashListener';
+import FormValidation from './extras/FormValidation';
+import Transition from './extras/Transition';
+import AttachLoading from './extras/AttachLoading';
+import StripeLoader from './extras/StripeLoader';
+import StylesheetLoader from './extras/StylesheetLoader';
+import AssetLoader from './extras/AssetLoader';
+import DataConfig from './extras/DataConfig';
+
+if (window.Snowboard === undefined) {
+    throw new Error('Snowboard must be loaded in order to use the extra plugins.');
+}
+
+((Snowboard) => {
+    Snowboard.addPlugin('assetLoader', AssetLoader);
+    Snowboard.addPlugin('dataConfig', DataConfig);
+    Snowboard.addPlugin('extrasStyles', StylesheetLoader);
+    Snowboard.addPlugin('transition', Transition);
+    Snowboard.addPlugin('flash', Flash);
+    Snowboard.addPlugin('flashListener', FlashListener);
+    Snowboard.addPlugin('formValidation', FormValidation);
+    Snowboard.addPlugin('attachLoading', AttachLoading);
+    Snowboard.addPlugin('stripeLoader', StripeLoader);
+})(window.Snowboard);