refactor: migrate from MUI to Ant Design for layout and components

- Updated package.json to remove MUI dependencies and add Ant Design.
- Refactored App component to use Ant Design's Layout, Header, Footer, and Sidebar.
- Created new Footer, Header, and Sidebar components using Ant Design.
- Removed old Header component that used MUI.
- Updated Home component to use Ant Design's Typography and Button.
- Added global styles in index.less and theme styles in theme.less and layout.less.
- Removed MUI theme configuration and replaced it with Ant Design's theming.

frontend/src/Layout/Header.tsx

@@ -0,0 +1,11 @@
+import { Layout } from 'antd';
+import React from 'react';
+import '../theme/layout.less';
+
+const { Header } = Layout;
+
+const AppHeader: React.FC = () => {
+  return <Header>MitM Webserver</Header>;
+};
+
+export default AppHeader;