Implement QuestObjective expire duration

[AlmasB]

See:

sealed class QuestObjective
@JvmOverloads
constructor(

        /**
         * Text that tells the player how to achieve this objective.
         */
        val description: String,
        
        /**
         * How much time is given to complete this objective.
         * Default: 0 - unlimited.
         */
        val expireDuration: Duration = Duration.ZERO)

[AlmasB]

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