[Feature]Enable set proxy

[ssyzyg]

Feature description

How can I set proxy for accessing chatGPT? I get "access denied" message.

Motivation

No response

Alternatives

No response

Additional context

This is the error message

Access denied You do not have access to chat.openai.com. The site owner may have set restrictions that prevent you from accessing the site.

[yixinBC]

As I have commented:https://github.com/lencx/ChatGPT/issues/280#issuecomment-1410377081, But set the system-level proxy may help you to solve the problem.

[lencx]

ref: https://github.com/lencx/ChatGPT/issues/574