### What problem does this PR solve?
Edit chunk shall update instead of insert it. Close#3679
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
When parsing a docx file using the Book parsing method, to_page is
always -1, resulting in a block count of 0 even if parsing is successful
Fix:#3230
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>
### What problem does this PR solve?
- Update readme
- Add license
### Type of change
- [x] Documentation Update
---------
Signed-off-by: Jin Hai <haijin.chn@gmail.com>
