Add the black linter workflow

[metabiswadeep]

Add the black linter to ensure proper linting of the code. As a project with multiple users contributing to it, it is essential to maintain a proper linting style to ensure better code readability by users. An excellent way to do this is by automatic linting checks using GitHub actions.

I would like to work on this as a part of GSSoC 23.

[PradyumnaKrishna]

We already have black linter in workflow.