fix: Handle case where the locale param is an array and set cookie expiration to one year

[amannn]

Changes:

• Handle case where the locale param is an array
• Set cookie expiration to one year
• Pin Next.js version in examples
• Use latest tag in examples (for CSB)

Fixes #431

[vercel]

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[aXenDeveloper]

Hi 👋
I see you're pinned version for next, but do you have plan to upgrade next to the latest version?
For me not-found.tsx file not working from 13.4.10+ version of next.

[amannn]

Thanks for chiming in @aXenDeveloper!

Eventually, I'd definitely like to upgrade to the latest version, but I've been bitten quite a few times by now with subtle bugs that were introduced in Next.js patch versions.

The latest being:

• 404 Not Found: "No intl context found. Have you configured the provider?" #423
• Cant get 404 working from the documentation example #434 (possibly)

It takes quite some time to diagnose these issues and to participate in the upstream discussions. Some of these issues will be ironed out anyway again on the Next.js side, therefore I think it might be reasonable to stay a few patch versions behind on a release that is known to be stable.