feat: inject `slice-simulator` automatically

[lihbr]

Types of changes

• [ ] Chore (a non-breaking change which is related to package maintenance)
• [ ] Bug fix (a non-breaking change which fixes an issue)
• [x] New feature (a non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Description

Automatically inject the Slice Simulator based on @prismicio/slice-simulator-vue or @slicemachine/adapter-nuxt presence following the same strategy as with the /preview page

Checklist:

• [x] My change requires an update to the official documentation.
• [x] All TSDoc comments are up-to-date and new ones have been added where necessary.
• [x] All new and existing tests are passing.

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