Add notice for new consumers

New consumers are strongly encouraged to check out @dnd-kit before adopting this library in a new project. It supports all of the features of react-sortable-hoc, but with a more modern and extensible architecture.

This library will continue to receive critical updates and bug fixes for the foreseeable future, but there are no new features planned. In future versions of React, the findDOMNode method will be deprecated. This method is a critical piece of the architecture of react-sortable-hoc, and it's unlikely that the library could continue to exist with its current architecture once this method is deprecated. In light of this, all development efforts have been redirected towards @dnd-kit.

Author: clauderic

README.md

@@ -10,6 +10,12 @@
 
 ### Examples available here: <a href="#">http://clauderic.github.io/react-sortable-hoc/</a>
 
+## ⚠️ Important notice for new consumers
+
+New consumers are strongly encouraged to **check out [@dnd-kit](https://github.com/clauderic/dnd-kit) before adopting this library in a new project**. It supports all of the features of react-sortable-hoc, but with a more modern and extensible architecture.
+
+This library will continue to receive critical updates and bug fixes for the foreseeable future, but there are no new features planned. In future versions of React, the [`findDOMNode`](https://reactjs.org/docs/react-dom.html#finddomnode) method will be deprecated. This method is a critical piece of the architecture of `react-sortable-hoc`, and it's unlikely that the library could continue to exist with its current architecture once this method is deprecated. In light of this, all development efforts have been redirected towards [@dnd-kit](https://github.com/clauderic/dnd-kit).
+
 ## Features
 
 - **Higher Order Components** – Integrates with your existing components