perf(addons): switch to empathic for upwards FS traversal

[43081j]

Switches to empathic for finding parent files, a much faster library.

Part of consolidating every find-* dependency into just one.

Checklist for Contributors

Testing

The changes in this PR are covered in the following automated tests:

• stories
• unit tests
• integration tests
• end-to-end tests

Manual testing

Existing tests should cover it.

Documentation

• Add or update documentation reflecting your changes
• If you are deprecating/removing a feature, make sure to update
  MIGRATION.MD

Checklist for Maintainers

• When this PR is ready for testing, make sure to add ci:normal, ci:merged or ci:daily GH label to it to run a specific set of sandboxes. The particular set of sandboxes can be found in code/lib/cli-storybook/src/sandbox-templates.ts

• Make sure this PR contains one of the labels below:

  Available labels

  • bug: Internal changes that fixes incorrect behavior.
  • maintenance: User-facing maintenance tasks.
  • dependencies: Upgrading (sometimes downgrading) dependencies.
  • build: Internal-facing build tooling & test updates. Will not show up in release changelog.
  • cleanup: Minor cleanup style change. Will not show up in release changelog.
  • documentation: Documentation only changes. Will not show up in release changelog.
  • feature request: Introducing a new feature.
  • BREAKING CHANGE: Changes that break compatibility in some way with current major version.
  • other: Changes that don't fit in the above categories.

Greptile Summary

This PR replaces the find-up package with empathic for file system traversal in the Storybook Vitest addon, aiming to improve performance during configuration file discovery.

• Changed startVitest method in vitest-manager.ts to use synchronous empathic/find instead of async find-up
• Updated package.json to replace find-up dependency with empathic
• Modified postinstall.ts to use empathic/find for upwards file system traversal
• Maintains existing functionality while potentially improving performance during Vitest initialization
• Part of broader initiative to consolidate file-finding dependencies into a single library

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[greptile-apps]

LGTM

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[nx-cloud]

View your CI Pipeline Execution ↗ for commit ffae911.

Command	Status	Duration	Result
nx run-many -t build --parallel=3	✅ Succeeded	1m 43s	View ↗

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☁️ Nx Cloud last updated this comment at 2025-05-06 12:36:23 UTC

[43081j]

This and my other branches may actually be replaced by #31338

if we get that PR over the line, this can be closed and my other branches deleted

I'll switch this to a draft for now

[mrginglymus]

@43081j this can be closed now?

[43081j]

it can! thanks for pinging me 🙏