As per title. This should be independent of doDaylightCycle, so players can have worlds where it is always day, but seasons progress.

It's been a year, and I'd find this really convenient, so I hope you won't mind me poking it. I'll leave it for another year after this, unless of course I manage to learn how to do it myself in the meantime - in which case I'll send you a PR. Presumably something in SeasonHandler.onWorldTick that checks a value that can be set via a command.