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

themes/vivespos/pages/home.htm

@@ -0,0 +1,20 @@
+title = "VivesPOS — Punto de Venta Offline-First para Mexico"
+meta_title = "VivesPOS — Punto de Venta Offline-First para Mexico"
+meta_description = "Punto de venta offline-first. Vende sin internet, tus datos siempre tuyos. Keyboard-first, scanner de codigo de barras, corte X/Z, impresion ESC/POS. Windows y Linux."
+url = "/"
+layout = "default"
+
+[blogPosts]
+postsPerPage = 3
+postPage = "blog/post"
+sortOrder = "published_at desc"
+noPostsMessage = "Pronto publicaremos articulos. Vuelve pronto!"
+==
+{% partial 'home/hero' %}
+{% partial 'home/features' %}
+{% partial 'home/modes' %}
+{% partial 'home/screenshots' %}
+{% partial 'home/pricing' %}
+{% partial 'home/comparison' %}
+{% partial 'home/faq' %}
+{% partial 'home/cta' %}