[Feature Request] Logs should be compressed and retained for a length of time after StepMania is closed.

[ListenerJubatus]

Is your feature request related to a problem? Please describe.

Logs are automatically overwritten each time StepMania is launched, which can make them harder to retrieve for issue tracking/debug purposes in certain scenarios.

Describe the solution you'd like

Logs should be retained for a period of time by default so that issues from past StepMania sessions can be retained for debug purposes. The log from the previous session (n+1) should be moved into a subfolder of the logs directory rather than overwritten, while older logs for a length of time (beginning at n+2) could be automatically compressed into a timestamped archive. I would suggest that older log archives (either based on timeframes or the number of launches since (10? 5?) be cleared periodically for disk space purposes, and that this aspect of the system be configurable via preferences (i.e. ArchiveLogFiles, ClearLogArchivesAfterXDays?)