help wanted
描述
Currently all generated help text is sent to stderr (Console.Error) when an error occurs:
https://github.com/commandlineparser/commandline/blob/7aa501d534a657c388f94f66127b4f8dde64ac59/src/CommandLine/Parser.cs#L199
Wouldn't it make more sense to only send the actual error there, and send the rest of the help text (both before and after) to stdout (Console.Out)?