Add a periodic hook disconnected from timeout-hook

[ronisbr]

What would you like to be able to do?

Let's say I have a local Maildir that is synced using mbsync. If I only sync after a timeout, then the timeout-hook is fine. On the other hand, suppose that I use imapnotify to sync emails on demand (when they are received) on INBOX only. I would like to set timeout to as low as possible, so that the e-mail is received almost instantly. However, it is also good to perform a full sync (all folders) from time to time because of the possible modifications I am doing to my Maildir directory inside NeoMutt. In this case, it will be very nice to have a hook that is run periodically separated from timeout.

What needs to change in NeoMutt?

I think we just need a periodic-hook to add as many periodic hooks as we want. The syntax can be:

periodic-hook <NAME> <timeout> <command>

Have you tried any alternative methods?

Currently, I am firing a script using startup-hook that is doing this periodic task.