Remove Python cache files and update .gitignore

Co-authored-by: fduminy <143904+fduminy@users.noreply.github.com>

Author: Copilot

.gitignore

@@ -17,3 +17,4 @@ classlib.pack.gz
 /mavenizer/target/**
 **/.shelf/
 **/.idea/
+__pycache__/