Details for Turbopack loaders. (#62300)
### What?
Bringing Turbopack for Next.js documentation from `turbo.build` to
`nextjs.org/docs`.
> Note: After this PR lands, there will be a subsequent PR to
`vercel/turbo` to remove these docs from `turbo.build` and redirect
here.
### Why?
Previously, this documentation was on `turbo.build`. This was confusing
because these docs weren't specific to Next.js. Rather, they are for
Next.js developers who want to configure their bundler (which happens to
be Turbopack under the hood).
We had seen a number of times that folks were unable to find loader and
configuration support for the their Next.js + Turbopack applications so
this PR should help surface that information better where folks are
looking for it.
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Co-authored-by: Delba de Oliveira <32464864+delbaoliveira@users.noreply.github.com>
