建议导出时支持枚举

[wensaint]

现状：
导入时，同时支持枚举与ValueMapping，代码示例如下：

        [ImporterHeader(Name = "是否已通过")]
        [ValueMapping(text: "是", true)]
        [ValueMapping(text: "否", false)]
        public bool? IsProved { get; set; }
        
        [ExporterHeader(DisplayName = "审核方式")]
        public CheckTypeEnum CheckTypeName { get; set; }

然而在导出时，却只支持ValueMapping，不支持枚举，这种前后不一致性，很容易让人掉坑，希望能统一支持枚举

[hueifeng]

You can add the Description feature to the enumerated values, and I'll continue to fix the Value import problem you mentioned.

public enum MyEnum
{
   [Description("C Test")]
    C
}