next.js

4b5db167 - Turbopack Build: docs for unsupported composes handling (#80238)

Turbopack Build: docs for unsupported composes handling (#80238) ## What? Adds additional documentation about `.css` (not `.module.css`) files being imported from a `.module.css` (CSS Module) using `composes` or `@import` and updates the tests to reflect the specific case not being supported.