[FEATURE] - add an timer to the $afk command

[gamiel-7-2]

Is your feature request related to a problem? Please describe

No.

A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
Im gonna try to sleep but I'm not sure if I will actually sleep or not , and if I was sure I was gonna sleep I would do $sto 7h but I'm not sure , and I'm also gonna forget to unafk or send messages so I can't just do normal afk and $permafk

Describe the solution you'd like

An timer for the $afk command like on $sto

A clear and concise description of what you want to happen.
I do something like:
$afk 7h
Then I am afk for 7 hours for the reason.

Describe alternatives you've considered

I mentioned it before , $permafk and $afk

A clear and concise description of any alternative solutions or features you've considered.

Additional Context

Add any other context or screenshots about the feature request here.