Feat: dynamic slowmode for high-usage channels

[JayAndJef]

Primary channels in Pydis see a large fluctuation in amount of users. Using metrics from Dave or channel monitoring, it could be possible to implement a dynamic slowmode for channels such as Python general or career discussion based on hours with more or less users online at the time.

For example, pygen could have a 5sec timeout during high load times and 3sec during low load times.

[jb3]

I've polled the Moderators on this, we don't feel there is much use to having this be automated and it is a lot of effort for a feature that is not going to make a noticable difference for users.

Instead, I'm going to open another issue with the newly requested feature for Moderators being able to timeout slowmodes.