Fix: Implement DOMPurify to sanitize HTML content before rendering (#1498)

### 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

web/package.json

@@ -28,6 +28,7 @@
     "classnames": "^2.5.1",
     "dagre": "^0.8.5",
     "dayjs": "^1.11.10",
+    "dompurify": "^3.1.6",
     "elkjs": "^0.9.3",
     "eventsource-parser": "^1.1.2",
     "human-id": "^4.1.1",
@@ -63,6 +64,7 @@
     "@testing-library/jest-dom": "^6.4.5",
     "@testing-library/react": "^15.0.7",
     "@types/dagre": "^0.7.52",
+    "@types/dompurify": "^3.0.5",
     "@types/jest": "^29.5.12",
     "@types/lodash": "^4.14.202",
     "@types/react": "^18.0.33",