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

resources/sass/_variables.scss

@@ -0,0 +1,7 @@
+// Body
+$body-bg: #f8fafc;
+
+// Typography
+$font-family-sans-serif: 'Nunito', sans-serif;
+$font-size-base: 0.9rem;
+$line-height-base: 1.6;

resources/sass/app.scss

@@ -0,0 +1,8 @@
+// Fonts
+@import url('https://fonts.bunny.net/css?family=Nunito');
+
+// Variables
+@import 'variables';
+
+// Bootstrap
+@import 'bootstrap/scss/bootstrap';