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/README.stub

@@ -0,0 +1,9 @@
+# {{code}} Winter CMS Theme
+
+This theme uses [Vite](https://wintercms.com/docs/develop/docs/console/asset-compilation-vite) for asset compilation. It also uses [Tailwind CSS](https://tailwindcss.com/).
+
+## Getting Started
+
+1. Run [`artisan vite:install`](https://wintercms.com/docs/console/asset-compilation#mix-install) and agree when asked to modify the `package.json` file for your project in order to register & install this theme's dependencies.
+2. Run [`artisan vite:compile -p theme-{{code}} --production`](https://wintercms.com/docs/develop/docs/console/asset-compilation-vite#compile-a-vite-packages) to compile the asset files for this theme.
+3. Optionally, run [`artisan vite:watch theme-{{code}}`](https://wintercms.com/docs/develop/docs/console/asset-compilation-vite#watch-a-vite-package) while actively working on the theme to have the assets automatically recompiled in the background for you every time you make a change.