fix(nuxt): support multiple app presets

[danielroe]

Description

A change coming in Nuxt 2.8.1, we now granularly inject composable auto-imports (nuxt/nuxt#23951) so there is not a single app preset. The change in this PR should be backward compatible.

Additional context

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What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

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