Support for splitting messages into multiple files in a directory

[iverks]

Is your feature request related to a problem? Please describe.

Having all translations per language in a single file gets crowded for large projects. It would be nice to split them into multiple files based on namespace

Describe the solution you'd like

Having my translation namespaces as files nested in the messages/en folder and the messages/no folder like so

├── messages 
│   ├── en
│   │       ├── common.json
│   │       ├── frontpage.json
│   │       └── ...
│   ├── no
│   │       ├── common.json
│   │       ├── frontpage.json
│   │       └── ...
│   └── ...
│   

Describe alternatives you've considered

Manually importing every file with some clever loop in my layout.tsx and putting it into my messages.json

[amannn]

This has been discussed in #357 before, I hope this answers your question!

[amannn]

On a related note, there's now a VSCode integration for next-intl which helps to streamline the management of translations in large files: VSCode integration docs.