feat: add file icon to table of FileManager #345 (#543)

### What problem does this PR solve?

feat: add file icon to table of FileManager #345
fix: modify datasetDescription

### Type of change

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

web/src/pages/knowledge/model.ts

@@ -3,7 +3,7 @@ import kbService from '@/services/kbService';
 import { DvaModel } from 'umi';
 
 export interface KnowledgeModelState {
-  data: any[];
+  data: IKnowledge[];
   knowledge: IKnowledge;
 }