GUI for sslocal and others

[wangjq4214]

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The discontinuation of clash updates has me very concerned. I need a replacement, and I think ss-rust is a promising project because I am also a heavy Rust enthusiast. Currently, sslocal-rust lacks a continuously updated cross-platform GUI program, and I would like to develop and maintain one.

And I hope to participate in the maintenance of ss-Rust, during which I may need the help of some previous developers.