- [x] Review the changes from PR #6508 to understand rolldown integration - [x] Create rolldown.config.js file for packaged package - [x] Update package.json scripts to use rolldown instead of tsc - [x] Add rolldown as a devDependency to packaged package - [x] Create changeset file for the packaged package - [x] Test the build process - [x] Verify the build output <!-- START COPILOT CODING AGENT SUFFIX --> <!-- START COPILOT ORIGINAL PROMPT --> <details> <summary>Original prompt</summary> > do the same as https://github.com/dubzzz/fast-check/pull/6508 but applied to packaged package. do reuse the common helper </details> <!-- START COPILOT CODING AGENT TIPS --> --- ✨ Let Copilot coding agent [set things up for you](https://github.com/dubzzz/fast-check/issues/new?title=✨+Set+up+Copilot+instructions&body=Configure%20instructions%20for%20this%20repository%20as%20documented%20in%20%5BBest%20practices%20for%20Copilot%20coding%20agent%20in%20your%20repository%5D%28https://gh.io/copilot-coding-agent-tips%29%2E%0A%0A%3COnboard%20this%20repo%3E&assignees=copilot) — coding agent works faster and does higher quality work when set up for your repo. --------- Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: dubzzz <5300235+dubzzz@users.noreply.github.com>