### What problem does this PR solve?

Fix errors detected by Ruff

### Type of change

- [x] Refactoring

### 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?

Always open text file for write with UTF-8. Close #932 

### Type of change

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

### What problem does this PR solve?

- Update readme
- Add license

### Type of change

- [x] Documentation Update

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Signed-off-by: Jin Hai <haijin.chn@gmail.com>

* init README of deepdoc, add picture processer.

* add resume parsing