灾厄村民的手部动作

IllagerArmPose类是AbstractIllager类的内部类，定义了灾厄村民所有可能的手部动作

public static enum IllagerArmPose {
    CROSSED,
    ATTACKING,
    SPELLCASTING,
    BOW_AND_ARROW,
    CROSSBOW_HOLD,
    CROSSBOW_CHARGE,
    CELEBRATING,
    NEUTRAL;
}