fix: should print error correctly when worker unexpectedly exit

[9aoy]

Summary

• should print error correctly when worker unexpectedly exit
• exclude Node.js-specific flags from worker execArgv when test in Deno

Related Links

#828

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

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[Copilot]

Pull request overview

This PR fixes error reporting when worker setup fails by adding global process event handlers and conditionally excluding Node.js-specific flags when running in Deno.

• Adds global uncaughtException and unhandledRejection event handlers to catch worker setup errors
• Introduces isDeno detection to conditionally exclude Node.js-specific flags from worker execArgv
• Extracts error handling logic into a reusable handleUnexpectedExit function

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
packages/core/src/utils/helper.ts	Adds isDeno constant to detect Deno runtime
packages/core/src/pool/index.ts	Conditionally excludes Node.js experimental flags when running in Deno
packages/core/src/cli/commands.ts	Adds global process error handlers and extracts handleUnexpectedExit helper function
e2e/cli/fixtures/worker.error.config.ts	Adds test fixture config with invalid worker flag to test error handling
e2e/cli/config.test.ts	Adds test case to verify worker setup errors are printed correctly

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