### What problem does this PR solve?

Aims to stop the process of parsing.

### Type of change

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

### What problem does this PR solve?

Adds the doc for the newly added API method.

### Type of change


- [x] Documentation Update

### What problem does this PR solve?

show status of parsing.

### Type of change

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

### What problem does this PR solve?

Make the document start parsing.

### Type of change

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

### What problem does this PR solve?

Adds download_document api

### Type of change


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

### What problem does this PR solve?

Adds the API method of updating documents.


### Type of change

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

### What problem does this PR solve?

Adds the api of listing documentation.

### Type of change

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

### What problem does this PR solve?

Adds the functionality of deleting documentation

### Type of change

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

### What problem does this PR solve?

API: Adds the feature of uploading document.

### Type of change

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