Introduce pylint to increase code quality

[turbaszek]

Description
Introduce pylint for code quality analysis:
https://github.com/PyCQA/pylint

This can be easily done by adding a respectable hook to our pre-commit configuration. However, this may require a lot of changes to code and maybe better to split it into few commits in single PR.

Use case
Increase code quality, follow Python community best practices and avoid regression in future.

Related Issues
N/A

[michalslowikowski00]

I will do it.
Everyone loves quality. :)
https://www.youtube.com/watch?v=jbJ6Ufl5Kkc&ab_channel=MichaelFish

[michalslowikowski00]

Ok, it will require more work, as you said.
Before submitting this PR'a I will fix the code to make it compliant with pylint: part by part.
There will be few PR's. :)

[turbaszek]

@michalslowikowski00 the amount of work will depend on the number of errors. We can reduce them by adding more rules to ignored ones in pylintrc config file