Implement DOMPurify to sanitize HTML content before rendering

[dservian]

What problem does this PR solve?

This PR resolves issue #1491 related to HTML Injection and Cross-Site Scripting (XSS). The issue was caused by the unsafe usage of dangerouslySetInnerHTML without proper sanitization of user input.

Changes

• Added DOMPurify dependency.
• Updated the following components to use DOMPurify:
  • web/src/pages/add-knowledge/components/knowledge-chunk/components/chunk-card/index.tsx
  • web/src/pages/chat/markdown-content/index.tsx
  • web/src/pages/add-knowledge/components/knowledge-setting/category-panel.tsx

Type of change

• [x] Other (please describe): Security Fix