[Bug]: Storybook 9 - Storybook Test postinstall does not detect vitest.projects.ts file

[yannbf]

Describe the bug

In Vitest, normally users write vitest.workspace.ts file to configure their setup, but a vitest.projects.ts file is also possible, as an alias to workspace. Check the docs here.

When installing Storybook vitest addon, it doesn't detect a projects file.

Steps:

• Find any Storybook project with a vitest.workspace.ts file
• Rename it to vitest.projects.ts
• Run npx storybook add @storybook/addon-vitest
• Notice that it will ignore the vitest projects file and create an entirely new vitest.workspace.ts file

Expected behavior:
It should do the same as it would with a workspaces file, but in the projects file instead.

Reproduction link

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System

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Additional context

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