Support integrity in text spacing with prettyprint

Image shows multi-column text for which the Textract returns words with bounding box information.

Aim: Support export/pretty print retaining the spaces shown in the document i.e print digital text in multi-column format.
Example:

Conversion of text to the following format:

```
1 First chapter 3
1.1 Section One 3
1.2 Section Two 3
1.3 Section Three 3

2 Last chapter 5
2.1 Section One 5
22 Section Two 5
2.3 Section Three 5
```