feat(knowledge): add knowledge base management with dialog system

- Implement knowledge base list, create, and detail pages
- Add dialog provider and components for confirmation and alerts
- Include knowledge card and grid view components
- Enhance header with user menu and logout functionality
- Implement knowledge operations hooks for CRUD operations

src/pages/Dashboard.tsx

@@ -29,7 +29,7 @@ import {
   CheckCircle as CheckCircleIcon,
 } from '@mui/icons-material';
 import { styled } from '@mui/material/styles';
-import KnowledgeGridView from '@/components/KnowledgeGridView';
+import KnowledgeGridView from '@/components/knowledge/KnowledgeGridView';
 import UserDataDebug from '@/components/UserDataDebug';
 import { useNavigate } from 'react-router-dom';