How to format number and datetime ?

### Clear and concise description of the problem

`vue-i18n` exposes `$n()` for [formatting numbers](https://vue-i18n.intlify.dev/guide/essentials/number.html) as well as `$d()` for [formatting dates](https://vue-i18n.intlify.dev/guide/essentials/datetime.html) but according to the docs `intlify/h3` dont expose them, only `const t = await useTranslation(event);`?