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/less/updates/details.less

@@ -0,0 +1,89 @@
+@import "../../../../backend/assets/less/core/boot.less";
+
+@padding-container: 0;
+
+.plugin-details-content {
+    padding: 0 @padding-container;
+
+    > *:first-child {
+        margin-top: 0;
+    }
+
+    h1 { font-size: @font-size-h1 - 8; }
+    h2 { font-size: @font-size-h2 - 6; }
+    h3 { font-size: @font-size-h3 - 4; }
+    h4 { font-size: @font-size-h4 - 1; }
+
+    h1, h2 { padding-bottom: 10px; border-bottom: 1px solid #ccc; }
+
+    img {
+        max-width: 100%;
+    }
+
+    ul, ol {
+        padding-left: @padding-standard;
+    }
+
+    pre {
+        display: block;
+        border: none;
+        margin: 10px -(@padding-standard + @padding-container) 20px;
+        padding: 10px 10px 10px (@padding-standard + @padding-container);
+        font-size: 13px;
+        word-break: break-all;
+        word-wrap: break-word;
+        color: #fff;
+        background-color: #333;
+        code {
+            padding: 0;
+            font-size: inherit;
+            color: inherit;
+            white-space: pre-wrap;
+            background-color: transparent;
+            border-radius: 0;
+        }
+    }
+
+    ul pre,
+    ol pre {
+        margin-left: -((@padding-standard * 2) + @padding-container);
+        padding-left: ((@padding-standard * 2) + @padding-container);
+    }
+
+    table {
+        th {
+            font-weight: bold;
+        }
+
+        th, td {
+            padding: 6px 13px;
+            border: 1px solid #ddd;
+        }
+
+        tr {
+            background-color: #fff;
+            border-top: 1px solid #ccc;
+
+            &:nth-child(2n) {
+                background-color: #f8f8f8;
+            }
+        }
+    }
+
+    dl {
+        dt, dd {
+            margin-bottom: (@padding-standard / 2);
+        }
+        dt {
+            width: 75px;
+            float: left;
+            text-align: right;
+            text-overflow: ellipsis;
+            overflow: hidden;
+            white-space: nowrap;
+        }
+        dd {
+            margin-left: 85px;
+        }
+    }
+}