Function used in mission creation.
Objective: The player has to give a specific amount of money to a given NPC.
name: Objective name, only used by the mission designer.
amount: Amount of money to give to the NPC to validate the objective.
hide_obj (Boolean): Prevent the step to be displayed in the mission log.
npc_name: Tag of the NPC that the player has to give money to.
overload_objective (Optional): Allow to set a specific a description of the mission. See text guidelines for the formatting requirements.
roleplay_objective (Optional): Allow to add a description to the step.