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/cms/console/scaffold/theme/tailwind/partials/meta/seo.stub

@@ -0,0 +1,11 @@
+{% if this.theme.googleanalytics_id is not empty %}
+    <!-- Global site tag (gtag.js) - Google Analytics -->
+    <script async src="https://www.googletagmanager.com/gtag/js?id={{ this.theme.googleanalytics_id }}"></script>
+    <script>
+        window.dataLayer = window.dataLayer || [];
+        function gtag(){dataLayer.push(arguments);}
+        gtag('js', new Date());
+
+        gtag('config', '{{ this.theme.googleanalytics_id }}');
+    </script>
+{% endif %}

modules/cms/console/scaffold/theme/tailwind/partials/meta/styles.stub

@@ -0,0 +1,12 @@
+==
+{{ vite(['assets/src/css/theme-{{code}}.css'], 'theme-{{code}}') }}
+
+<style>
+    :root {
+        --primary: {{ this.theme.color_primary }};
+        --secondary: {{ this.theme.color_secondary }};
+    }
+</style>
+
+{% styles %}
+{% placeholder head %}