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/media.less

@@ -0,0 +1,66 @@
+.media {
+  // Proper spacing between instances of .media
+  margin-top: 15px;
+
+  &:first-child {
+    margin-top: 0;
+  }
+}
+
+.media,
+.media-body {
+  zoom: 1;
+  overflow: hidden;
+}
+
+.media-body {
+  width: 10000px;
+}
+
+.media-object {
+  display: block;
+
+  // Fix collapse in webkit from max-width: 100% and display: table-cell.
+  &.img-thumbnail {
+    max-width: none;
+  }
+}
+
+.media-right,
+.media > .pull-right {
+  padding-left: 10px;
+}
+
+.media-left,
+.media > .pull-left {
+  padding-right: 10px;
+}
+
+.media-left,
+.media-right,
+.media-body {
+  display: table-cell;
+  vertical-align: top;
+}
+
+.media-middle {
+  vertical-align: middle;
+}
+
+.media-bottom {
+  vertical-align: bottom;
+}
+
+// Reset margins on headings for tighter default spacing
+.media-heading {
+  margin-top: 0;
+  margin-bottom: 5px;
+}
+
+// Media list variation
+//
+// Undo default ul/ol styles
+.media-list {
+  padding-left: 0;
+  list-style: none;
+}