INFO, WARN, ERROR Logging Standard

[mlajkim]

Background

Currently, there is no standard or meaning differences in log level like Error, Warn, Info or Debug.
#62 (comment)

TODOs

• Make sure that the INFO is the de facto standard that is enough for most of the users to handle no problem.
  • debug is for those who want more details only (not that many people)
• Get the logging convention
• Write the documentation or linter for the convention
• Enforce the rules if possible
• Fix the logging type according to the rule you create