sanity auto redirect function

[surajroboto]

Sanity function to create a new redirect if the slug changes. However, there's an issue with that when it comes to Next.js. I know they are fetched in the next.config.ts, however, that means the redirects are only created at build time. This would become an issue for example, you publish an article with a new/updated slug after the application is deployed. The new redirect would not be picked up and folks going to the outdated URL would not get the redirect.