feat(dev): print changed nuxt.config keys on a config-triggered reload

[danielroe]

🔗 Linked issue

📚 Description

this feature is paired with nuxt/nuxt#35853

if the end user has a new enough version of nuxt kit (v4.6+), we can get updates on what changed (and we can even skip reloading if it's just a comment).

👉 you can test if you have https://pkg.pr.new/@nuxt/kit@35853 installed in your project

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Review details

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 220d94d9-7437-42b1-a1ca-10d4d80f87db

📥 Commits

Reviewing files that changed from the base of the PR and between f6ebadd and f6d9011.

📒 Files selected for processing (3)

• packages/nuxt-cli/src/dev/reason.ts
• packages/nuxt-cli/src/dev/utils.ts
• packages/nuxt-cli/test/unit/restart-reason.spec.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/onchanged

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[pkg-pr-new]

• nuxt-cli-playground

  npm i https://pkg.pr.new/create-nuxt@1403
  

  npm i https://pkg.pr.new/nuxi@1403
  

  npm i https://pkg.pr.new/@nuxt/cli@1403
  

commit: f6d9011

[codspeed-hq]

Merging this PR will not alter performance

✅ 2 untouched benchmarks

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_{Comparing feat/onchanged (f6d9011) with main (f6ebadd)}