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/datepicker.md

@@ -0,0 +1,102 @@
+# Date Pickers
+
+Renders a date picker, time picker, or both. The input associated to each control acts as a facade, the final value is stored in an underlying hidden input, called a data locker.
+
+## Examples
+
+### Date Picker
+
+    <div data-control="datepicker">
+        <!-- Date -->
+        <input
+            type="text"
+            class="form-control"
+            placeholder="Select a date"
+            data-datepicker />
+
+        <!-- Data locker -->
+        <input
+            type="hidden"
+            name="my_date"
+            data-datetime-value
+            />
+    </div>
+
+### Time Picker
+
+    <div data-control="datepicker">
+        <!-- Time -->
+        <input
+            type="text"
+            class="form-control"
+            placeholder="Select a time"
+            data-timepicker />
+
+        <!-- Data locker -->
+        <input
+            type="hidden"
+            name="my_date"
+            data-datetime-value
+            />
+    </div>
+
+### Date & Time Picker
+
+    <div data-control="datepicker">
+        <div class="row">
+            <div class="col-md-6">
+                <!-- Date -->
+                <input
+                    type="text"
+                    class="form-control"
+                    placeholder="Select a date"
+                    data-datepicker />
+            </div>
+            <div class="col-md-6">
+                <!-- Time -->
+                <input
+                    type="text"
+                    class="form-control"
+                    placeholder="Select a time"
+                    data-timepicker />
+            </div>
+        </div>
+
+        <!-- Data locker -->
+        <input
+            type="hidden"
+            name="my_date"
+            data-datetime-value
+            />
+    </div>
+
+## Locale and timezone handling
+
+The date picker handles timezone and locale preferences automatically. Locale preferences will provide the date format for the region. The timezone setting is used to convert the chosen value to a uniform timezone, commonly UTC. These features are not enabled by default and require adding `<meta />` tags to the page.
+
+```html
+<meta name="app-timezone" content="UTC">
+<meta name="backend-timezone" content="Australia/Sydney">
+<meta name="backend-locale" content="en-au">
+```
+
+When a date is selected, it will be converted from the `backend-timezone` to the `app-timezone` for normalized storage.
+
+> **Note**: Locale values are supplied by the Moment.js library.
+
+## Supported data attributes
+
+- data-control="datepicker" - enables the plugin on an element
+- data-format="YYYY-MM-DD" - display format
+- data-min-date="value" - minimum date to allow
+- data-max-date="value" - maximum date to allow
+- data-year-range="10" - range of years to display
+
+## JavaScript API
+
+```js
+$('div#datepicker').datePicker({
+    format: 'YYYY-MM-DD',
+    yearRange: 10
+})
+```