docs(examples): nextjs app router example

[vonovak]

Description

This migrates the existing nextjs app to use app router, next to pages router.

The idea is to merge this (the 2 commits as they are) and then the tutorial will point to the second commit that did the migration work, and people can then replicate it in their migrations.

For those that want to just see the app router integration, they can do so by looking into the app router directory.

This also means that maintainers have one project to worry about as opposed to having an example for app router, pages router, babel, swc...

I'm not yet entirely happy about how the pages router is integrating lingui but that's something for later

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Examples update

Fixes # (issue)

Checklist

• I have read the CONTRIBUTING and CODE_OF_CONDUCT docs
• I have added tests that prove my fix is effective or that my feature works
• I have added the necessary documentation (if appropriate)

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
js-lingui	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 29, 2024 9:10am

[github-actions]

size-limit report 📦

Path	Size
./packages/core/dist/index.mjs	2.88 KB (0%)
./packages/detect-locale/dist/index.mjs	723 B (0%)
./packages/react/dist/index.mjs	1.67 KB (0%)
./packages/remote-loader/dist/index.mjs	7.26 KB (0%)

[andrii-bodnar]

@vonovak looks good to me, thanks a lot! 🚀

P.S. I updated the PR title feat -> docs because it actually does not bring any features into the tool, but it will increment the minor version during the release.

[dominik-sfl]

When will this be merged? Would love to see it on the site.