chore: add changeset

Author: natemoo-re

.changeset/legal-bags-tie.md

@@ -0,0 +1,8 @@
+---
+"@clack/prompts": major
+"@clack/core": major
+---
+
+The package is now distributed as ESM-only. In `v0` releases, the package was dual-published as CJS and ESM.
+
+For existing CJS projects using Node v20+, please see Node's guide on [Loading ECMAScript modules using `require()`](https://nodejs.org/docs/latest-v20.x/api/modules.html#loading-ecmascript-modules-using-require).