TUN Inbound: mannul tun desc of Windows

[Jasper344612]

XTLS/Xray-docs-next#872 (comment)

Windows 手动配置 TUN Desc，默认值为 Wintun 即 Wintun Tunnel

        {
            "tag": "tun", 
            "protocol": "tun", 
            "settings": {
                 // 添加配置
                "desc": "xxx",
                "mtu": 1500,
                ...
            }
        }

实际效果应为

(base) PS C:\Users\saruo\Desktop\tun_test> route print
===========================================================================
接口列表
124...........................xxx Tunnel