feat(api): use request fetch

[dargmuesli]

🔗 Linked issue

#3676

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

See Nuxt server's forwarding context & headers description.

Using the method described there, this PR aims to make the context forwarding more flexible. This helps me adding support for the nuxt-csurf module for example.

Please check the first commit first to see the actual change this PR proposes more clearly. Due to a typescript excessive stack depth error I had to refactor the code a bit in the second commit.

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

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[pkg-pr-new]

npm i https://pkg.pr.new/@nuxt/content@3677

commit: a03fea8