[Feature] 希望能增加一个设置本地代理的功能

[FoobarRogers]

Checklist

• [X] I have already read docs/Tips.md, but my feature is not implemented.
• [X] My suggested feature was not mentioned by others, and it is not a duplicate feature.

Summary

因为亚服账号的战技和开拓月历需要连接代理访问，而反复开关tun模式确实不太方便，可以的话设置一个本地代理接口，http、https或者sock5都可以，比如一般常见的127.0.0.1模式

Solution or Design