[lint] Missing code linting and code formatting configurations

[muskangupta-iitr]

There are no configurations and scripts for lint fixing and solving code formatting issues during development.

We can use eslint for solving linting and prettier for solving code formatting issues.

Settings

• OS: Linux (Ubuntu 18.04)

[muskangupta-iitr]

@AdrianBZG @Nikhil-Vats Please review!