[Feature Request]: Add support for chain proxy

[mmmshab]

Describe the new feature you want

In current definition of nodes, we can define just one layer of proxy as preproxy or landing poxy, so I need to use multiple proxies to chain together for special scenarios.

Describe the solution you want

Like proxychain tools on linux, I want use multiple proxies. Also the Nekobox application on android has proxy chain feature and very useful.

Describe the alternatives you considered

No response

Other Information

No response

[github-actions]

Stale Issue