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

config/modules.php

@@ -0,0 +1,67 @@
+<?php
+
+/*
+|--------------------------------------------------------------------------
+| Module Configuration
+|--------------------------------------------------------------------------
+|
+| This file contains the configuration for the modular system.
+| Each module can be enabled/disabled individually via .env variables
+| or by changing the values below.
+|
+| Modules are self-contained units with their own routes, controllers,
+| models, views, and service providers. The core system functions
+| correctly with or without any module enabled.
+|
+*/
+
+return [
+
+    /*
+    |----------------------------------------------------------------------
+    | Products Module
+    |----------------------------------------------------------------------
+    |
+    | Manages the product catalog, categories, and related admin features.
+    | Disable this module if the site does not need product listings.
+    |
+    */
+    'products' => [
+        'enabled' => env('MODULE_PRODUCTS_ENABLED', true),
+        'name' => 'Products',
+        'description' => 'Product catalog management with categories',
+    ],
+
+    /*
+    |----------------------------------------------------------------------
+    | Services Module
+    |----------------------------------------------------------------------
+    |
+    | Manages the services catalog and related admin features.
+    | Disable this module if the site does not need service listings.
+    |
+    */
+    'services' => [
+        'enabled' => env('MODULE_SERVICES_ENABLED', true),
+        'name' => 'Services',
+        'description' => 'Service catalog management',
+    ],
+
+    /*
+    |----------------------------------------------------------------------
+    | Chatbot Module
+    |----------------------------------------------------------------------
+    |
+    | AI-powered customer service chatbot using OpenRouter.ai API.
+    | Provides a floating chat widget for visitors and a knowledge base
+    | management interface for admins. Disable this module if the site
+    | does not need an AI chatbot.
+    |
+    */
+    'chatbot' => [
+        'enabled' => env('MODULE_CHATBOT_ENABLED', true),
+        'name' => 'Chatbot',
+        'description' => 'AI-powered customer service chatbot with OpenRouter',
+    ],
+
+];