fix: filter knowledge list by keywords and clear the selected file list after...

fix: filter knowledge list by keywords and clear the selected file list after the file is uploaded successfully and add ellipsis pattern to chunk list (#628)

### What problem does this PR solve?

#627 
fix: filter knowledge list by keywords
fix: clear the selected file list after the file is uploaded
successfully
feat: add ellipsis pattern to chunk list

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)