Add pylint through ruff

ruff was added in #599

Some of the rules were intentionally ignored in pyproject.toml to allow us to enable them one by one and make the required changes. The goal of this issue is to remove ["PLR1714", "PLC0414", "PLC0105", "PLW2901"] from the ignore section and make the changes wherever required.

ruff should provide information when you run ruff check after the rule is removed from the toml file.