chore: migrate to tsdown

[sxzz]

tsup is not actively maintained anymore, migrating to new alternative tsdown.

[changeset-bot]

🦋 Changeset detected

Latest commit: d65abb3

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 11 packages

Name	Type
@react-router/dev	Major
react-router	Major
@react-router/fs-routes	Major
@react-router/remix-routes-option-adapter	Major
@react-router/architect	Major
@react-router/cloudflare	Major
react-router-dom	Major
@react-router/express	Major
@react-router/node	Major
@react-router/serve	Major
create-react-router	Major

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[remix-cla-bot]

Hi @sxzz,

Welcome, and thank you for contributing to React Router!

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 hello@remix.run.

Thanks!

- The Remix team

[remix-cla-bot]

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

[timdorr]

@sxzz Can you rebase this against dev instead of main?

[sxzz]

I will investigate t$1 error.