feat: support DeepSeek (#667)

### What problem does this PR solve?

#666 
feat: support DeepSeek
feat: preview word and excel

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/pages/user-setting/setting-model/index.tsx

@@ -45,6 +45,7 @@ const IconMap = {
   文心一言: 'wenxin',
   Ollama: 'ollama',
   Xinference: 'xinference',
+  DeepSeek: 'deepseek',
 };
 
 const LlmIcon = ({ name }: { name: string }) => {