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/backend/database/seeds/DatabaseSeeder.php

@@ -0,0 +1,33 @@
+<?php namespace Backend\Database\Seeds;
+
+use Str;
+use Seeder;
+use Eloquent;
+use Backend\Database\Seeds\SeedSetupAdmin;
+
+class DatabaseSeeder extends Seeder
+{
+    /**
+     * Run the database seeds.
+     *
+     * @return string
+     */
+    public function run()
+    {
+        $shouldRandomizePassword = SeedSetupAdmin::$password === '';
+        $adminPassword = $shouldRandomizePassword ? Str::random(22) : SeedSetupAdmin::$password;
+
+        Eloquent::unguarded(function () use ($adminPassword) {
+            // Generate a random password for the seeded admin account
+            $adminSeeder = new \Backend\Database\Seeds\SeedSetupAdmin;
+            $adminSeeder->setDefaults([
+                'password' => $adminPassword
+            ]);
+            $this->call($adminSeeder);
+        });
+
+        return ($shouldRandomizePassword)
+            ? 'The following password has been automatically generated for the "admin" account: <fg=yellow;options=bold>' . $adminPassword . '</>'
+            : '';
+    }
+}