Function getVitalPointsStats

Returns {
    byCategory: {
        joint: number;
        muscular: number;
        neurological: number;
        organ: number;
        respiratory: number;
        skeletal: number;
        vascular: number;
    };
    byRegion: { arms: number; head: number; legs: number; torso: number };
    bySeverity: {
        critical: number;
        lethal: number;
        major: number;
        minor: number;
        moderate: number;
    };
    total: number;
}

Statistics about the vital points system