Make histoire Nuxt 4 ready

As a developer using Histoire I want the Histoire plugin to fully support Nuxt 4,
so that I can preview, document, and test my UI components directly within my Nuxt 4 project without manual configuration or compatibility issues.

Suggested solution

TODO

Alternative

No response

Additional context

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that requests the same feature to avoid creating a duplicate.