### What problem does this PR solve?

Issue link:#299

### Type of change

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

### What problem does this PR solve?

Issue link:#299

### Type of change

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

### What problem does this PR solve?

Issue link:#221

### Type of change

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

* init README of deepdoc, add picture processer.

* add resume parsing

* add front end code

* change licence

* clean rust version project

* clean rust version project

* build python version rag-flow

* add llm API

* refine llm API