docs: add moved message to readme

Author: laurenashpole

README.md

@@ -1,3 +1,9 @@
+# MOVED
+
+This package has moved to the [inner-image-zoom](https://github.com/laurenashpole/inner-image-zoom) repo. For React specific docs, click [here](https://github.com/laurenashpole/inner-image-zoom/tree/main/packages/react) or check out the new demos site [here](https://innerimagezoom.com/). Issues and PRs have been left open for reference/consideration in future releases in that repo.
+
+---
+
 # react-inner-image-zoom
 
 [Demos](https://laurenashpole.github.io/react-inner-image-zoom)