[Feature] Support socks5 proxy with authentication

Playwright version

lastest

Operating system

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What browsers are you seeing the problem on?

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Other information

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What happened? / Describe the bug

  _proxy = {
        "server": f"{proxy.scheme}://{proxy.ip}:{proxy.port}",
        "username": f"{proxy.username}",
        "password": f"{proxy.password}"
    }

this proxy is correct, i can use it via requests. but in playwright, it doesnt work . the doc says it support http or socks, how to use socks5 proxy ? thank yoy.

Code snippet to reproduce your bug

_proxy = {
            "server": f"{proxy.scheme}://{proxy.ip}:{proxy.port}",
            "username": f"{proxy.username}",
            "password": f"{proxy.password}"
        }

this proxy is correct, i can use it via requests. but in playwright, it doesnt work .
the doc says it support http or socks, 
how to use socks5 proxy ?
thank yoy.

Relevant log output

No response

[pavelfeldman]

Let’s see if others upvote this.

[dstampher]

Any update on adding this functionality?