next.js

e838f268 - feat: Allow specifying `useLightningcss` for `styled-jsx` (#61359)

feat: Allow specifying `useLightningcss` for `styled-jsx` (#61359) ### What? Add `styledJsx` option to the schema. ### Why? This is required to test `lightningcss` against internal apps. ### How? Closes PACK-2316