Value.HelpText can be localized, but not Value.MetaName?

I have defined an options class like this:
```cs
public class FileOptions
{
public FileOptions(IEnumerable fileCouples)
{
this.FileCouples = fileCouples;
}

[Value(
0,
Min = 1,
Max = 2,
MetaName = "FileCoupleHelpName",
HelpText = "FileCoupleHelpText",
ResourceType = typeof(Resources))]
public IEnumerable FileCouples { get; }
}
```
It is written [here](https://github.com/commandlineparser/commandline/wiki/Help-Localization) that the `HelpText` can be localized when we specify the `ResourceType` and give `HelpText` the name of the string in the Resources file. While that works for the `HelpText`, it doesn't for the `MetaName`, which is a bit unfortunate in my opinion. Indeed, the help generated with the above options class gets its help text translated, but not the meta name, which also appears in the help.

Is there a way to make it happen?

先從 Value 屬性的在地化行為和 Help Localization wiki 指南著手，接著追蹤設定 ResourceType 時 HelpText 與 MetaName 的解析方式。完成的定義是 MetaName 能夠與 HelpText 一致地進行在地化，並有一個涵蓋範例選項類別的回歸測試。

由索引模型根據 Issue 內容生成。