Support `ws+unix:` in WebSocket client

[Electroid]

This should be possible, but we don't support it yet.

const ws = new WebSocket("ws+unix:///path/to/file.sock");

[Jarred-Sumner]

1. A boolean arg here + call connectUnix if is unix:

https://github.com/oven-sh/bun/blob/main/src/http/websocket_http_client.zig#L268

2. Allow "unix" protocol in

https://github.com/oven-sh/bun/blob/main/src/bun.js/bindings/webcore/WebSocket.cpp#L296

[WingLim]

@Jarred-Sumner Hi, can you assign this to me?

[cs01]

I am doing some experimenting with bun and ran into this today. Would be great to see this landed.

[cs01]

I will take a shot at fixing this