Remove all obsolete authentication, settings, admin, and demo-related components and pages

- Eliminated redundant components, pages, and layouts related to authentication (`login`, `register`, `password-reset`, etc.), user settings, admin, and demos.
- Simplified the frontend structure by removing unused dynamic imports, forms, and test code.
- Refactored configurations and metadata imports to exclude references to removed features.
- Streamlined the project for future development and improved maintainability by discarding legacy and unused code.

frontend/src/components/home/AnimatedTerminal.tsx

@@ -9,7 +9,7 @@ import { useEffect, useState, useRef } from 'react';
 import { motion } from 'framer-motion';
 import { Terminal, Play } from 'lucide-react';
 import { Button } from '@/components/ui/button';
-import Link from 'next/link';
+import { Link } from '@/lib/i18n/routing';
 
 const commands = [
   { text: '# Clone the repository', delay: 0 },