Formatter and linter

[AndrewKorzh]

Title

Add formatter and linter

Description

In this PR, a formatter and linter has been added

Type of change

• New feature (non-breaking change which adds functionality)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

[MatthewZMSU]

You have committed changes with indent-width = 2 - it is NOT PEP8 correct.
Please, solve all the problems I mentioned.