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

themes/demo/assets/vendor/bootstrap/less/wells.less

@@ -0,0 +1,29 @@
+//
+// Wells
+// --------------------------------------------------
+
+
+// Base class
+.well {
+  min-height: 20px;
+  padding: 19px;
+  margin-bottom: 20px;
+  background-color: @well-bg;
+  border: 1px solid @well-border;
+  border-radius: @border-radius-base;
+  .box-shadow(inset 0 1px 1px rgba(0,0,0,.05));
+  blockquote {
+    border-color: #ddd;
+    border-color: rgba(0,0,0,.15);
+  }
+}
+
+// Sizes
+.well-lg {
+  padding: 24px;
+  border-radius: @border-radius-large;
+}
+.well-sm {
+  padding: 9px;
+  border-radius: @border-radius-small;
+}