Enable pylint checks (#4092)

* pylint: enable checks for imports

* ci: add github action for pylint

* enable pylint on pre-commit

* Install requirements

* use local pylint installation rather than of pre-commit's

* fix import errors

* more checks

* Silence unused imports

* Make a copy of dict

fastentrypoints.py

@@ -91,7 +91,6 @@ easy_install.ScriptWriter.get_args = get_args
 
 def main():
     import os
-    import re
     import shutil
     import sys