### 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)
### What problem does this PR solve?
fix: fix uploaded file time error #680
feat: support preview of word and excel #684
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
fix: add spin to parsing status icon of dataset table
#648
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
fix: #567 use modal to upload files in the knowledge base
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
#345
feat: translate FileManager
feat: batch delete files from the file table in the knowledge base
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
document list needs to be batch operated
Issue link: #301
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
* feat: select the corresponding parsing method according to the file type
* feat: after the document is successfully uploaded, use the ChunkMethodModal to select the parsing method.
* feat: add pdf types to ParserListMap
* feat: remove ChunkMethodModal from knowledge-file
* fix: by obtaining the width and height of the pdf and passing it to boundingRect, the problem of inaccurate positioning of file highlighting is fixed
* feat: remove actualPositions from buildChunkHighlights
