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.