fix(cli): use user-defined error hook

[markthree]

🔗 Linked issue

h3js/h3#695

❓ Type of change

• 📖 Documentation (updates to the documentation, readme, or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

We should use the user-defined onError hook

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[pi0]

I was thinking we could inherit/merge all options. For example for this h3js/h3#693 (and debug option)

[markthree]

Of course this would be better, but I've tested how to do the merge and some of the hooks trigger twice

for example ↓

if (_handler.options) {
  // This causes some hooks to run twice
  app.options = Object.assign(app.options, _handler.options)
}

I think this might be a bug in h3, and I think I'd have to look deeper at h3 as well.

I like unjs/h3#693，But I'd like to see the logic of your implementation, let's try to keep the behavior consistent 🥰