next.js

aeed1c77 - add support for globally providing mdx components to turbopack (#49818)

add support for globally providing mdx components to turbopack (#49818) ### What? Adds support for `mdx-components` at the root/src directory. This is a feature `next-mdx` already has: https://github.com/vercel/next.js/tree/canary/packages/next-mdx#usage-1 Fixes WEB-1012 Depends on https://github.com/vercel/turbo/pull/4944 ### Turbopack updates * https://github.com/vercel/turbo/pull/4949 <!-- OJ Kwon - refactor(turbopack): deprecate single react_refresh options --> * https://github.com/vercel/turbo/pull/4944 <!-- Leah - add mdx `providerImportSource` option -->