feat: update dependencies and add new styles

- Added node and sass to dependencies in package.json
- Added @types/node to devDependencies
- Removed unused CSS files and replaced them with SCSS files
- Updated import paths in App.tsx and Blog.tsx to use new aliasing
- Configured TypeScript paths for easier imports
- Updated Vite config to include path aliases
- Created new SCSS files for About, Blog, Error, and Main styles
- Added a variables file for color and effect variables
- Updated index.scss for global styles and responsive adjustments

src/pages/Contact.tsx

@@ -1,8 +1,6 @@
 import { PageHeader } from '../components/PageHeader';
 import { ContactForm } from '../components/ContactForm';
 
-import './Contact.module.css';
-
 export const Contact = () => {
   return (
     <>