Pylint Github Action v2 - More customization

This version breaks backward compatibility with version v1 since a parameter has been renamed!

Changed

• Renamed package-path to lint-path

Added

• More example in the readme documenting how to lint also single python files other than full packages
• Added color-bad-score, color-ok-score, color-good-score, color-perfect-score parameters to fully customize color badge for each score range
• Added badge-text parameter for changing the text displayed in the left part of the badge