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/cms/console/scaffold/theme/less/assets/js/app.stub

@@ -0,0 +1,33 @@
+/*
+ * Application
+ */
+(function($) {
+    "use strict";
+
+    jQuery(document).ready(function($) {
+        /*-------------------------------
+        WINTER CMS FLASH MESSAGE HANDLING
+        ---------------------------------*/
+        $(document).on('ajaxSetup', function(event, context) {
+            // Enable AJAX handling of Flash messages on all AJAX requests
+            context.options.flash = true;
+
+            // Enable the StripeLoadIndicator on all AJAX requests
+            context.options.loading = $.oc.stripeLoadIndicator;
+
+            // Handle Flash Messages
+            context.options.handleFlashMessage = function(message, type) {
+                $.oc.flashMsg({ text: message, class: type });
+            };
+
+            // Handle Error Messages
+            context.options.handleErrorMessage = function(message) {
+                $.oc.flashMsg({ text: message, class: 'error' });
+            };
+        });
+    });
+}(jQuery));
+
+if (typeof(gtag) !== 'function') {
+    gtag = function() { console.log('GoogleAnalytics not present.'); }
+}