Enhance frontend-web with new features and dependencies

- Added new font support for 'Oxanium' and integrated Radix UI components including Dialog and Select.
- Updated CSS to set the default font to 'Oxanium Variable' and adjusted HTML font size.
- Introduced AddAccountDialog component for managing debt accounts, enhancing user experience.
- Refactored DebtsPage to utilize the new AddAccountDialog and improved account management features.
- Updated Redux store to support debt categories and accounts, including actions for adding, updating, and removing accounts.
- Mock data added for clients and invoices to facilitate development and testing.

frontend-web/src/main.tsx

@@ -2,7 +2,7 @@ import {StrictMode} from 'react';
 import {createRoot} from 'react-dom/client';
 import {Provider} from 'react-redux';
 import {store} from './store';
-import '@fontsource-variable/geist';
+import '@fontsource-variable/oxanium';
 import './index.css';
 import App from './App.tsx';