fix: import StorybookConfig explicitly as type

[cardoso]

Proposed changes

This type import should be explicit to avoid a runtime error in certain dev environment setups where type-stripping is less robust (eg: node >=23.6). The change shouldn't affect setups where this currently works, since the syntax itself was introduced in ts 3.8. It's simply more widely supported.

Refs:

• https://nodejs.org/en/blog/release/v23.6.0
• https://www.typescriptlang.org/docs/handbook/release-notes/typescript-3-8.html

Issue(s)

How to test or reproduce

With node >=23.6
yarn ios

Screenshots

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• Improvement (non-breaking change which improves a current function)
• New feature (non-breaking change which adds functionality)
• Documentation update (if none of the other choices apply)

Checklist

• I have read the CONTRIBUTING doc
• I have signed the CLA
• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works (if applicable)
• I have added necessary documentation (if applicable)
• Any dependent changes have been merged and published in downstream modules

Further comments