Add linting

[sertansenturk]

One-line summary (optional) introduce pylint gradually

Reason

Design

Acceptance Criteria

• Clarify unit tests and integration tests even if there are none.

Outcome

• Clarify the deliverables (code, process etc.) and documentation, where applicable.

Don't forget to

• Point the ticket
• Set priority as a label
• Assign to a person
• Link dependencies, if applicable