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/ui/less/tooltip.variables.less

@@ -0,0 +1,12 @@
+//
+// Tooltips
+// --------------------------------------------------
+
+@tooltip-max-width:           200px;
+@tooltip-color:               #fff;
+@tooltip-bg:                  @brand-primary;
+@tooltip-opacity:             .9;
+
+@tooltip-arrow-width:         5px;
+@tooltip-arrow-color:         @tooltip-bg;
+@tooltip-box-shadow:          ~"0 3px 6px rgba(0, 0, 0, 0.16), 0 2px 4px rgba(0, 0, 0, 0.23)";