Supports obtaining PDF documents from web pages (#1107)

### What problem does this PR solve?

Knowledge base management supports crawling information from web pages
and generating PDF documents

### Type of change
- [x] New Feature (Support document from web pages)

web/src/locales/zh.ts

@@ -80,6 +80,7 @@ export default {
       searchFiles: '搜索文件',
       localFiles: '本地文件',
       emptyFiles: '新建空文件',
+      webCrawl: '网页抓取',
       chunkNumber: '分块数',
       uploadDate: '上传日期',
       chunkMethod: '解析方法',