flake8 and black in workflow

[chetak123]

Description

Added flake8 linter and black formatter in workflow using lint.yml and black.yml

Fixes #71

Checklist:

• [ ] My PR follows the style guidelines of this project
• [ ] I have performed a self-review of my own code or materials
• [ ] I have commented my code or provided relevant documentation, particularly in hard-to-understand areas
• [ ] My changes generate no new warnings
• [ ] New and existing unit tests pass locally with my changes

[ritik307]

@felixfaisal Kindly merge the PR

[felixfaisal]

Looks like we have a bunch of linting issues with python code, I'll raise an issue to first fix all the existing warnings and then merge this PR Thanks for the PR @chetak123