feat(cms): implement complete SysSiteCMS content management system

Initial implementation of the HomeSysPanel CMS built with Laravel 13.0.
Includes complete admin panel, content management, user authentication,
modular architecture for products/services/chatbot, and marketing tools.

Key features:
- User authentication with email verification and password reset
- Role-based access control (Admin/User with granular permissions)
- Content management (pages, news, FAQ, downloads, galleries, banners)
- Contact management system with subjects and responses
- Marketing tools (email campaigns, visitor analytics, social sharing)
- Modular architecture (Products, Services, Chatbot modules)
- AI Chatbot integration with OpenRouter.ai and LlamaCpp support
- Visitor tracking with geolocation
- SEO optimization with meta tags and Open Graph
- Responsive design with Bootstrap 5
- Dark mode support
- Maintenance mode
- Feature request system

app/Models/UserType.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class UserType extends Model
+{
+    protected $fillable = ['name', 'description', 'is_admin', 'is_protected'];
+
+    protected function casts(): array
+    {
+        return [
+            'is_admin' => 'boolean',
+            'is_protected' => 'boolean',
+        ];
+    }
+
+    /**
+     * Get the users with this type.
+     */
+    public function users()
+    {
+        return User::where('user_type', $this->name);
+    }
+
+    /**
+     * Get all user types as a key-value array for select fields.
+     *
+     * @return \Illuminate\Database\Eloquent\Collection
+     */
+    public static function getAllForSelect()
+    {
+        return self::orderBy('name')->get();
+    }
+}