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

plugins/winter/demo/components/Todo.php

@@ -0,0 +1,50 @@
+<?php namespace Winter\Demo\Components;
+
+use Flash;
+use ApplicationException;
+use Cms\Classes\ComponentBase;
+
+class Todo extends ComponentBase
+{
+
+    public function componentDetails()
+    {
+        return [
+            'name'        => 'Todo List',
+            'description' => 'Implements a simple to-do list.'
+        ];
+    }
+
+    public function defineProperties()
+    {
+        return [
+            'max' => [
+                'description'       => 'The most amount of todo items allowed',
+                'title'             => 'Max items',
+                'default'           => 10,
+                'type'              => 'string',
+                'validationPattern' => '^[0-9]+$',
+                'validationMessage' => 'The Max Items value is required and should be integer.'
+            ]
+        ];
+    }
+
+    public function onAddItem()
+    {
+        $items = post('items', []);
+
+        if (count($items) >= $this->property('max')) {
+            throw new ApplicationException(sprintf('Sorry only %s items are allowed.', $this->property('max')));
+        }
+
+        $newItem = post('newItem');
+        if (empty($newItem)) {
+            Flash::error('You must specify an item to add to the To Do List.');
+            return;
+        }
+
+        $items[] = $newItem;
+
+        $this->page['items'] = $items;
+    }
+}