(source: reported by @benjamincanac / reproduced on https://github.com/nuxt/ui/tree/847ee4591abee63cc503bf32d62341d16be6ebc5 dist/runtimes/types/index.ts after build)

#243 introduced a regression in 1.5.7+ with addRelativeDeclarationExtensions option since it assumes all source file will emit a .vue.d.ts companion while files with script setup are not transpiled (and therefore don't emit this file), they need type import with .vue

I have added snapshot tests to reproduce it: