Update App router documentation links

[PinkChampagne17]

Some links in App router docs still point to Pages router docs, which could confuse users and lead to outdated information. This pull request updates the links to App router documentation.

[vercel-spaces]

Notifying the following users due to files changed in this PR:

@timneutkens, @ijjk, @shuding, @huozhi, @feedthejim:

docs/02-app/02-api-reference/01-components/link.mdx
docs/02-app/02-api-reference/04-functions/revalidatePath.mdx
docs/02-app/02-api-reference/04-functions/revalidateTag.mdx
docs/02-app/02-api-reference/04-functions/use-router.mdx
docs/02-app/02-api-reference/05-next-config-js/appDir.mdx
docs/02-app/02-api-reference/05-next-config-js/assetPrefix.mdx
docs/02-app/02-api-reference/05-next-config-js/basePath.mdx
docs/02-app/02-api-reference/05-next-config-js/env.mdx
docs/02-app/02-api-reference/05-next-config-js/exportPathMap.mdx
docs/02-app/02-api-reference/05-next-config-js/headers.mdx
docs/02-app/02-api-reference/05-next-config-js/images.mdx
docs/02-app/02-api-reference/05-next-config-js/output.mdx
+4 more

This comment was posted based on the notify modifier.

[tyler-lutz]

I noticed this as well. The problem is that these pages are shared between the app and pages router documentation, so changing them to app would mean they would link to the app router on the pages documentation. I was planning to go through all the shared documentation and separating all the links into and so that there isn't a bunch of switching between the routers when going through the links.

[styfle]

This seems correct at first but I think its going to have the opposite issue since a lot of the docs are the same for Pages and App Router.

For example, see these two:

• /docs/03-pages/02-api-reference/03-next-config-js/images.mdx
• /docs/02-app/02-api-reference/05-next-config-js/images.mdx

I'll defer to @delbaoliveira here since we need a way to link the two related pages together.

[delbaoliveira]

For now, you can wrap the links with the <AppOnly> and <PagesOnly> components, and these will get filtered out depending on which option is selected. However, it does mean we'll need two links.

[tyler-lutz]

@delbaoliveira I made another pull request for this. #51733

[styfle]

Closing in favor of #51733