Add timer to `!play` command

Checklist

[X] I read and understood ASF's Contributing guidelines
[X] I also read Setting-up and FAQ, I don't need help, this is an enhancement idea
[X] This is not a duplicate of an existing issue
[X] My idea doesn't duplicate existing ASF functionality described on the wiki
[X] I believe that my idea falls into ASF's scope and should be offered as part of ASF built-in functionality
[X] My idea doesn't violate the Steam Subscriber Agreement
[X] My idea doesn't violate the Steam Online Conduct
[X] This is not ASF-ui suggestion

Enhancement purpose

I use the play command often for some giveaway sites that track game play time. Some request time over 10 hours. I don't want to leave it on playing a game and forget.

Solution

Add an optional property at the end of the command for amount of time a game should be played for: !play ASF 111111 60 would play appid 111111 for 60 minutes and then return to normal function.

A solution that exceeds this request would be something that allows for a list of games and times, so it plays each one for a set time before moving to the next.

Why currently available solutions are not sufficient?

Currently, it's quite annoying to have to set times or impossible to resume the bot because the user my not have ability to send commands to the bot (sleeping, at work, etc)

Can you help us with this enhancement idea?

Yes, I can code the solution myself and send a pull request

Additional info

Re: coded solution. I don't know much c# but if you point me to sections of relevant code I could probably get something working

JustArchiNET / ArchiSteamFarm