feat: configurable ComponentCustomProperties['$i18n'] type

[BobbieGoede]

Note, I have not tested if this works using the v11 codebase, this is cherry-picked from #2093.

---

(Copied PR body from #2093 )

This uses the same pattern as the Locale type narrowing, in this case it narrows the $i18n custom component property to either VueI18n or ExportedGlobalComposer but keeps the original behavior (VueI18n | ExportedGlobalComposer) if left unset.

Usage like so:

declare module '@intlify/vue-i18n-core' {
  interface GeneratedTypeConfig {
    legacy: false
  }
}

I wish I looked into this earlier, since the legacy API is going to be removed soon 😅..

Related

• types: locale property from nuxtApp.$i18n is string & computedRef<string> nuxt-modules/i18n#2157
• Incorrect types in the global $i18n object nuxt-modules/i18n#3329

[kazupon]

LGTM!
Thanks! 💚