Add timeout utility extensions methods

[Ayfri]

Summary

Add a method to easily timeout a member for a duration and a method to disable timeout of a member.

Current Behaviour

Editing the member timeoutUntil or communicationDisabledUntil property, if we want to deactivate until now + a duration, we have to include a calculation into our code.

Preferred Behaviour

Use methods for this.

Suggestions

/**
 * Disable communication for a member until now + duration.
 * Returns false if the bot cannot set the timeout for the member, otherwise true.
**/
suspend fun MemberBehavior.timeout(duration: Duration): Boolean
// and maybe also
suspend fun MemberBehavior.timeout(seconds: int): Boolean

/**
 * Remove disabled communication for a member.
 * Returns false if the bot cannot enable communication for member, otherwise true.
**/
suspend fun MemberBehavior.stopTimeout()

[boring-cyborg]

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[gdude2002]

Done!