Support stripe-away slot of `ClientOnly` on SSG

[antfu]

Clear and concise description of the problem

It's common to encounter errors when using client-side only package. Even with <ClientOnly>, the users need to handle that carefully as the import can still be synchronized.

Suggested solution

We do a transform to Vue file that removes the content of <ClientOnly>. Similiar to https://github.com/nuxt/framework/pull/8713

Alternative

No response

Additional context

No response

Validations

• [X] Follow our Code of Conduct
• [X] Read the Contributing Guide.
• [X] Check that there isn't already an issue that request the same feature to avoid creating a duplicate.