refactor: update Ant Design imports to centralized path

- Replaced direct imports from 'antd' with centralized imports from '@/shared/antd-imports' to align with new import rules and improve maintainability.

worklenz-frontend/src/features/navbar/help/HelpButton.tsx

@@ -1,5 +1,5 @@
 import { QuestionCircleOutlined } from '@ant-design/icons';
-import { Button, Tooltip } from 'antd';
+import { Button, Tooltip } from '@/shared/antd-imports';
 import React from 'react';
 import { useTranslation } from 'react-i18next';
 import './HelpButton.css';