Add a way to restrict max channel archive duration

[MinnDevelopment]

In some situations, I want all threads in a channel to be limited to at max 1 hour of inactivity, such as a support channel with tickets. Some users think they need to set the threads to archive after 3 days of inactivity, which results in an accumulation of useless threads that moderators have to manually archive (which locks them).

It would be nice if you could set a maximum archive duration in the channel settings, similar to how you can already configure the default archive duration.