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/docs/button.md

@@ -0,0 +1,63 @@
+# Button
+
+## Buttons
+
+### Button tags
+
+Use the button classes on an `<a>`, `<button>`, or `<input>` element.
+
+    <a class="btn btn-default" href="#" role="button">Link</a>
+    <button class="btn btn-default" type="submit">Button</button>
+    <input class="btn btn-default" type="button" value="Input">
+    <input class="btn btn-default" type="submit" value="Submit">
+
+### Options
+
+Use any of the available button classes to quickly create a styled button.
+
+    <!-- Standard button -->
+    <button type="button" class="btn btn-default">Default</button>
+
+    <!-- Provides extra visual weight and identifies the primary action in a set of buttons -->
+    <button type="button" class="btn btn-primary">Primary</button>
+
+    <!-- Indicates a successful or positive action -->
+    <button type="button" class="btn btn-success">Success</button>
+
+    <!-- Contextual button for informational alert messages -->
+    <button type="button" class="btn btn-info">Info</button>
+
+    <!-- Indicates caution should be taken with this action -->
+    <button type="button" class="btn btn-warning">Warning</button>
+
+    <!-- Indicates a dangerous or potentially negative action -->
+    <button type="button" class="btn btn-danger">Danger</button>
+
+    <!-- Deemphasize a button by making it look like a link while maintaining button behavior -->
+    <button type="button" class="btn btn-link">Link</button>
+
+### Sizes
+
+Fancy larger or smaller buttons? Add `.btn-lg`, `.btn-sm`, or `.btn-xs` for additional sizes.
+
+    <p>
+        <button type="button" class="btn btn-primary btn-lg">Large button</button>
+        <button type="button" class="btn btn-default btn-lg">Large button</button>
+    </p>
+    <p>
+        <button type="button" class="btn btn-primary">Default button</button>
+        <button type="button" class="btn btn-default">Default button</button>
+    </p>
+    <p>
+        <button type="button" class="btn btn-primary btn-sm">Small button</button>
+        <button type="button" class="btn btn-default btn-sm">Small button</button>
+    </p>
+    <p>
+        <button type="button" class="btn btn-primary btn-xs">Extra small button</button>
+        <button type="button" class="btn btn-default btn-xs">Extra small button</button>
+    </p>
+
+Create block level buttons—those that span the full width of a parent— by adding .btn-block.
+
+    <button type="button" class="btn btn-primary btn-lg btn-block">Block level button</button>
+    <button type="button" class="btn btn-default btn-lg btn-block">Block level button</button>