[Feature]: Use 1 HMR websocket connection for mutilple micro-frontend apps in same page

[coder-czw]

What problem does this feature solve?

Scene

1. I have a single page: https://www.abc.com/
2. Use rspack run 3 micron-frontend in local:

• main-app in port 8001
• a1-app in port 8002
• a2-app in port 8003

3. Use qiankun.js to load a1-app and a2-app from main-app
4. Use whistle to proxy https://www.abc.com/ page resource to local
5. I wrote the proxy on main-app dev-server for a1-app and a2-app ports

Problem

1. The hmr websocket connections build failed.
2. Too much websocket connections

What does the proposed API of configuration look like?

I want my sub-apps hmr can access successfully， it will be better that I can use only 1 hmr websocket to update all sub-apps on the same page.