Add "use client" to entry points to keep Next from erroring

Author: markerikson

src/alternate-renderers.ts

@@ -1,3 +1,5 @@
+'use client'
+
 // The "alternate renderers" entry point is primarily here to fall back on a no-op
 // version of `unstable_batchedUpdates`, for use with renderers other than ReactDOM/RN.
 // Examples include React-Three-Fiber, Ink, etc.

src/index.ts

@@ -1,3 +1,5 @@
+'use client'
+
 // The primary entry point assumes we are working with React 18, and thus have
 // useSyncExternalStore available. We can import that directly from React itself.
 // The useSyncExternalStoreWithSelector has to be imported, but we can use the