### What problem does this PR solve?

Place pdf's image at the correct position in QA parser

### Type of change

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

### What problem does this PR solve?

Add docx support for manual parser

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

### What problem does this PR solve?

Add docx support for QA parser

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

### What problem does this PR solve?

#1161 
### Type of change

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

### What problem does this PR solve?

Add markdown support for QA parser

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

### What problem does this PR solve?

Support extracting questions and answers from PDF files

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

### What problem does this PR solve?
#651 

### Type of change

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

### What problem does this PR solve?
#614 

### Type of change

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

### What problem does this PR solve?

### Type of change

- [x] Refactoring

### What problem does this PR solve?

#384

### Type of change

- [x] Performance Improvement

### What problem does this PR solve?

_Briefly describe what this PR aims to solve. Include background context
that will help reviewers understand the purpose of the PR._

Issue link:#[[Link the issue
here](https://github.com/infiniflow/ragflow/issues/209)]

### Type of change

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

* init README of deepdoc, add picture processer.

* add resume parsing

Add naive chunking method to RAG