perf: remove string-width

[43081j]

We can use fast-string-width instead which is much faster and smaller, already in wide use too.

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: d0171db8-54cb-40fd-a021-4e22ac395a8f

📥 Commits

Reviewing files that changed from the base of the PR and between 677f1bd and 29e610f.

⛔ Files ignored due to path filters (1)

• package-lock.json is excluded by !**/package-lock.json

📒 Files selected for processing (2)

• packages/build/package.json
• packages/build/src/log/header.ts

🔗 Linked repositories identified

CodeRabbit considers these linked repositories for cross-repo context during reviews:

• netlify/blueprints (manual)

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📝 Walkthrough

Summary by CodeRabbit

• Bug Fixes
  • Improved header display width handling for more consistent log formatting across different characters.
  • Updated the underlying string-width calculation to use a faster, compatible implementation.

Walkthrough

This pull request replaces the string-width package dependency with fast-string-width in the build package's manifest and updates the corresponding import statement in the header rendering module. No functional logic changes were made to the header width computation.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Changes

File	Summary
packages/build/package.json	Removed string-width and added fast-string-width to dependencies.
packages/build/src/log/header.ts	Updated import of stringWidth to source from fast-string-width.

Sequence Diagram(s)

Not applicable — this change is a simple dependency substitution with no observable behavioral flow.

Related issues: None specified.

Related PRs: None specified.

Suggested labels: dependencies, chore

Suggested reviewers: None specified.

🐰 A tiny hop from one string to another,
Width still measured, no need to bother,
Fast-string-width now takes the lead,
Same old header, quicker indeed!

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description is missing the required Summary section and issue reference from the template.	Add a Summary with Fixes # and briefly explain the motivation for replacing string-width.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly matches the change: swapping out string-width for a faster alternative.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[github-actions]

e18e dependency analysis

No dependency warnings found.