Update next-intlayer reference in i18n doc (#83761)

[`next-intlayer`](https://intlayer.org/doc/environment/nextjs) is an
i18n library that adopts a per-component approach to manage multilingual
content in a next.js application.

### Changes
- Fix doc related to page-router documentation,
- And add App Router realted doc.

Co-authored-by: Joseph <[email protected]>

Author: aymericzip

docs/01-app/02-guides/internationalization.mdx

@@ -215,3 +215,4 @@ export default async function RootLayout({ children, params }) {
 - [`paraglide-next`](https://inlang.com/m/osslbuzt/paraglide-next-i18n)
 - [`lingui`](https://lingui.dev)
 - [`tolgee`](https://tolgee.io/apps-integrations/next)
+- [`next-intlayer`](https://intlayer.org/doc/environment/nextjs)

docs/02-pages/02-guides/internationalization.mdx

@@ -13,7 +13,7 @@ description: Next.js has built-in support for internationalized routing and lang
 
 Next.js has built-in support for internationalized ([i18n](https://en.wikipedia.org/wiki/Internationalization_and_localization#Naming)) routing since `v10.0.0`. You can provide a list of locales, the default locale, and domain-specific locales and Next.js will automatically handle the routing.
 
-The i18n routing support is currently meant to complement existing i18n library solutions like [`react-intl`](https://formatjs.io/docs/getting-started/installation), [`react-i18next`](https://react.i18next.com/), [`lingui`](https://lingui.dev/), [`rosetta`](https://github.com/lukeed/rosetta), [`next-intl`](https://github.com/amannn/next-intl), [`next-translate`](https://github.com/aralroca/next-translate), [`next-multilingual`](https://github.com/Avansai/next-multilingual), [`tolgee`](https://tolgee.io/integrations/next), [`paraglide-next`](https://inlang.com/m/osslbuzt/paraglide-next-i18n), [`next-intlayer`](https://intlayer.org/doc/environment/nextjs) and others by streamlining the routes and locale parsing.
+The i18n routing support is currently meant to complement existing i18n library solutions like [`react-intl`](https://formatjs.io/docs/getting-started/installation), [`react-i18next`](https://react.i18next.com/), [`lingui`](https://lingui.dev/), [`rosetta`](https://github.com/lukeed/rosetta), [`next-intl`](https://github.com/amannn/next-intl), [`next-translate`](https://github.com/aralroca/next-translate), [`next-multilingual`](https://github.com/Avansai/next-multilingual), [`tolgee`](https://tolgee.io/integrations/next), [`paraglide-next`](https://inlang.com/m/osslbuzt/paraglide-next-i18n), [`next-intlayer`](https://intlayer.org/doc/environment/nextjs/next-with-page-router) and others by streamlining the routes and locale parsing.
 
 ## Getting started