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/assets/less/controls/reportwidgets.less

@@ -0,0 +1,51 @@
+.report-widget {
+    padding: 15px;
+    background: white;
+    .box-sizing(border-box);
+    .border-radius(@border-radius-base);
+    font-size: @font-size-base - 1;
+
+    h3 {
+        font-size: @font-size-base;
+        color: @color-report-widget-title;
+        text-transform: uppercase;
+        font-weight: 600;
+        margin-top: 0;
+        margin-bottom: 30px;
+    }
+
+    .height-100 { height: 100px; }
+    .height-200 { height: 200px; }
+    .height-300 { height: 300px; }
+    .height-400 { height: 400px; }
+    .height-500 { height: 500px; }
+
+    p.report-description {
+        margin-bottom: 0;
+        margin-top: 15px;
+        font-size: 12px;
+        line-height: 190%;
+        color: @color-report-widget-description;
+    }
+
+    a:not(.btn) {
+        color: @color-report-widget-link;
+        text-decoration: none;
+        &:hover {
+            color: @link-color;
+            text-decoration: none;
+        }
+    }
+
+    p.flash-message.static {
+        margin-bottom: 0;
+    }
+
+    .icon-circle {
+        &.success { color: @brand-success; }
+        &.primary { color: @brand-primary; }
+        &.warning { color: @brand-warning; }
+        &.danger { color: @brand-danger; }
+        &.info { color: @brand-info; }
+    }
+}