feat(config): add server.forwardClientLogs option

[sylvain-abadie]

Description

Adds the server.forwardClientLogs config option to forward console.log, console.warn, console.error, etc. from the device to the terminal during test execution.

Related Issue

N/A

Context

• Uses Metro's built-in forwardClientLogs server option to receive client_log events
• Formats logs using util.format() to support printf-style specifiers (%s, %d, etc.)
• Styled output with colored level tags (LOG, WARN, ERROR, INFO, DEBUG) matching Jest's visual style

Testing

• Added unit tests in packages/jest/src/__tests__/client-log-handler.test.ts
• Manual testing with playground app using various console methods

[vercel]

@sylvain-abadie is attempting to deploy a commit to the Callstack Team on Vercel.

A member of the Team first needs to authorize it.

[V3RON]

Does it make sense to prefix logs with the HARNESS tag so it's clear where the logs are coming from? 🤔

[sylvain-abadie]

Does it make sense to prefix logs with the HARNESS tag so it's clear where the logs are coming from? 🤔

It's not something that you usually see in jest tests AFAIK. I personally agree with you that it adds clarity but I also don't want to stray too far from what people are used to. Happy to add a prefix if you feel it's the right approach. Let me know.

[V3RON]

I went ahead and added a version plan, and I also moved forwardClientLogs to the root of the config object.

Thanks for the contribution! 👏