Support for numbers as short options

We have the following options definition:

[Option('1', "readlog1", HelpText = "Reads log entries from the Log 1 memory.")]
public bool ReadLog1 { get; set; }

[Option('2', "readlog2", HelpText = "Reads log entries from the Log 2 memory.")]
public bool ReadLog2 { get; set; }

It looks like the short options don't work because they are numbers.
Is there any special reason for this?

首先追蹤短選項的解析方式，以及 Option 屬性如何驗證或註冊數字名稱。為 `Option('1', ...)` 和 `Option('2', ...)` 範例新增涵蓋，並在接受數字短選項且測試通過時視為工作完成。

由索引模型根據 Issue 內容生成。