feat: use ?inline to load critical styles

[sapphi-red]

The default export of css files was removed in Vite v5, but it was accidently left for SSR. Vite v6 removes that (vitejs/vite#17922). This PR changes the critical style loader to use ?inline imports to make remix compatible with Vite v6.

Testing Strategy: I ran pnpm i && pnpm vite-ecosystem-ci:build && pnpm vite-ecosystem-ci:test with both Vite 5.x and 6.x.

[remix-cla-bot]

Hi @sapphi-red,

Welcome, and thank you for contributing to Remix!

Before we consider your pull request, we ask that you sign our Contributor License Agreement (CLA). We require this only once.

You may review the CLA and sign it by adding your name to contributors.yml.

Once the CLA is signed, the CLA Signed label will be added to the pull request.

If you have already signed the CLA and received this response in error, or if you have any questions, please contact us at [email protected].

Thanks!

- The Remix team

[changeset-bot]

⚠️ No Changeset found

Latest commit: b0bd1de

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[remix-cla-bot]

Thank you for signing the Contributor License Agreement. Let's get this merged! 🥳