Added json_to_csv file (issue #188)

[onkar-kota]

Description

This a Python script allows you to convert json file to csv file and save them to a specified directory. It uses json and csv library to process json files and do manupulations accordingly.

Fixes #188

Type of change

• [X] My code follows the style guidelines of this project
• [X] I have performed a self-review of my code
• [X] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings

How Has This Been Tested?

The script has been tested using provided json_data and successfully run locally.

[DhanushNehru]

@onkar-kota can you update the main Readme.md as well?

[onkar-kota]

Hey @DhanushNehru updated main readme file, can you review it.