Use codacy for code quality check.

[carpecodeum]

Is your feature request related to a problem? Please describe.
Currently there is no way to check the code quality of a pull request.

Describe the solution you'd like
Use codacy for code quality check and add a codacy badge

Describe alternatives you've considered
N/A

Additional context
I would like to discuss this with the maintainers as this would require a badge of this repo from codacy.

[ashmitkhandelwal1]

Hi, I’d like to work on this issue as a first contribution.
I’ll start by exploring Codacy integration and share progress here.

[ashmitkhandelwal1]

I’ll begin with a minimal setup (configuration + badge) and keep the scope small, so it’s easy to review. Happy to adjust based on maintainer feedback.