chore(docs): update/add references to Nuxt 3 version

Author: rchl

README.md

@@ -14,8 +14,8 @@
 
 > i18n for your Nuxt project
 
-## For Nuxt 3?
-- 👷 working on [`next`](https://github.com/nuxt-community/i18n-module/tree/next) branch as v8
+## Looking for Nuxt 3 compatible version?
+- 👷 Work-in-progress on the v8 version in the [`next`](https://github.com/nuxt-community/i18n-module/tree/next) branch
 - 📘 [Documentation](https://v8.i18n.nuxtjs.org/)
 
 ## Links

docs/content/en/index.md

@@ -15,7 +15,7 @@ features:
 
 <alert type="info">
 
-You are looking at the documentation for the new `@nuxtjs/i18n` package. If you are instead looking for the documentation for the legacy `nuxt-i18n` (v6) package then go to [i18n-legacy.nuxtjs.org](https://i18n-legacy.nuxtjs.org/) instead.
+This documentation is for the Nuxt 2 version of the module. For version compatible with Nuxt 3 see https://v8.i18n.nuxtjs.org/.
 
 </alert>