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/vendor/jcrop/css/jquery.Jcrop.min.css

@@ -0,0 +1,29 @@
+/* jquery.Jcrop.min.css v0.9.12 (build:20130126) */
+.jcrop-holder{direction:ltr;text-align:left;}
+.jcrop-vline,.jcrop-hline{background:#FFF url(Jcrop.gif);font-size:0;position:absolute;}
+.jcrop-vline{height:100%;width:1px!important;}
+.jcrop-vline.right{right:0;}
+.jcrop-hline{height:1px!important;width:100%;}
+.jcrop-hline.bottom{bottom:0;}
+.jcrop-tracker{-webkit-tap-highlight-color:transparent;-webkit-touch-callout:none;-webkit-user-select:none;height:100%;width:100%;}
+.jcrop-handle{background-color:#333;border:1px #EEE solid;font-size:1px;height:7px;width:7px;}
+.jcrop-handle.ord-n{left:50%;margin-left:-4px;margin-top:-4px;top:0;}
+.jcrop-handle.ord-s{bottom:0;left:50%;margin-bottom:-4px;margin-left:-4px;}
+.jcrop-handle.ord-e{margin-right:-4px;margin-top:-4px;right:0;top:50%;}
+.jcrop-handle.ord-w{left:0;margin-left:-4px;margin-top:-4px;top:50%;}
+.jcrop-handle.ord-nw{left:0;margin-left:-4px;margin-top:-4px;top:0;}
+.jcrop-handle.ord-ne{margin-right:-4px;margin-top:-4px;right:0;top:0;}
+.jcrop-handle.ord-se{bottom:0;margin-bottom:-4px;margin-right:-4px;right:0;}
+.jcrop-handle.ord-sw{bottom:0;left:0;margin-bottom:-4px;margin-left:-4px;}
+.jcrop-dragbar.ord-n,.jcrop-dragbar.ord-s{height:7px;width:100%;}
+.jcrop-dragbar.ord-e,.jcrop-dragbar.ord-w{height:100%;width:7px;}
+.jcrop-dragbar.ord-n{margin-top:-4px;}
+.jcrop-dragbar.ord-s{bottom:0;margin-bottom:-4px;}
+.jcrop-dragbar.ord-e{margin-right:-4px;right:0;}
+.jcrop-dragbar.ord-w{margin-left:-4px;}
+.jcrop-light .jcrop-vline,.jcrop-light .jcrop-hline{background:#FFF;filter:alpha(opacity=70)!important;opacity:.70!important;}
+.jcrop-light .jcrop-handle{-moz-border-radius:3px;-webkit-border-radius:3px;background-color:#000;border-color:#FFF;border-radius:3px;}
+.jcrop-dark .jcrop-vline,.jcrop-dark .jcrop-hline{background:#000;filter:alpha(opacity=70)!important;opacity:.7!important;}
+.jcrop-dark .jcrop-handle{-moz-border-radius:3px;-webkit-border-radius:3px;background-color:#FFF;border-color:#000;border-radius:3px;}
+.solid-line .jcrop-vline,.solid-line .jcrop-hline{background:#FFF;}
+.jcrop-holder img,img.jcrop-preview{max-width:none;}