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/console/PluginInstall.php

@@ -0,0 +1,67 @@
+<?php namespace System\Console;
+
+use Winter\Storm\Console\Command;
+use System\Classes\UpdateManager;
+use System\Classes\PluginManager;
+
+/**
+ * Console command to install a new plugin.
+ *
+ * This adds a new plugin by requesting it from the Winter marketplace.
+ *
+ * @package winter\wn-system-module
+ * @author Alexey Bobkov, Samuel Georges
+ */
+class PluginInstall extends Command
+{
+    /**
+     * @var string|null The default command name for lazy loading.
+     */
+    protected static $defaultName = 'plugin:install';
+
+    /**
+     * @var string The name and signature of this command.
+     */
+    protected $signature = 'plugin:install
+        {plugin : The plugin to install. <info>(eg: Winter.Blog)</info>}';
+
+    /**
+     * @var string The console command description.
+     */
+    protected $description = 'Install a plugin from the Winter marketplace.';
+
+    /**
+     * Execute the console command.
+     * @return void
+     */
+    public function handle()
+    {
+        $pluginName = $this->argument('plugin');
+        $manager = UpdateManager::instance()->setNotesOutput($this->output);
+
+        $pluginDetails = $manager->requestPluginDetails($pluginName);
+
+        $code = array_get($pluginDetails, 'code');
+        $hash = array_get($pluginDetails, 'hash');
+
+        $this->output->writeln(sprintf('<info>Downloading plugin: %s</info>', $code));
+        $manager->downloadPlugin($code, $hash, true);
+
+        $this->output->writeln(sprintf('<info>Unpacking plugin: %s</info>', $code));
+        $manager->extractPlugin($code, $hash);
+
+        /*
+         * Make sure plugin is registered
+         */
+        $pluginManager = PluginManager::instance();
+        $pluginManager->loadPlugins();
+        $plugin = $pluginManager->findByIdentifier($code);
+        $pluginManager->registerPlugin($plugin, $code);
+
+        /*
+         * Migrate plugin
+         */
+        $this->output->writeln(sprintf('<info>Migrating plugin...</info>', $code));
+        $manager->updatePlugin($code);
+    }
+}