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/widgets/lists/assets/css/winter.list.sortable.css

@@ -0,0 +1,50 @@
+/*
+ * Drag-and-drop reordering styles for the list widget.
+ */
+.control-list .list-sort-handle-column,
+.control-list .list-cell-sort-handle {
+    width: 28px;
+    text-align: center;
+}
+
+/* The whole handle cell is the drag target (SortableJS handle is the cell), so
+   the grab affordance and hit area cover the entire cell, not just the icon.
+   The second selector is specific enough to override rowlink's
+   "tr.rowlink td.nolink { cursor: auto }" rule, which would otherwise reset the
+   cursor on this (intentionally) non-link cell when the list rows are clickable. */
+.control-list .list-cell-sort-handle,
+.control-list tr.rowlink td.list-cell-sort-handle.nolink {
+    cursor: move;
+    cursor: grab;
+}
+
+.control-list .list-cell-sort-handle:active,
+.control-list tr.rowlink td.list-cell-sort-handle.nolink:active {
+    cursor: grabbing;
+}
+
+.control-list .list-sort-handle {
+    display: inline-block;
+    color: #666;
+    line-height: 1;
+    text-decoration: none;
+    cursor: inherit;
+}
+
+.control-list tr:hover .list-sort-handle {
+    color: #333;
+}
+
+.control-list .list-sortable-ghost {
+    opacity: 0.5;
+    background: #f0f7fd;
+}
+
+.control-list .list-sortable-chosen {
+    background: #f7f9fa;
+}
+
+.control-list[data-sortable="true"] tbody tr {
+    /* Avoid text selection while dragging rows */
+    user-select: none;
+}