fix: archive repository

This project is not anymore maintained.

README.md

@@ -4,6 +4,10 @@
   <strong>Manage React Forms with ease.</strong>
 </p>
 
+<p align="center">
+  <strong>⚠️ This project is not maintained anymore, you can still use the code as you wish and fork it to maintain it yourself.</strong>
+</p>
+
 <p align="center">
   <a href="./CONTRIBUTING.md"><img src="https://img.shields.io/badge/PRs-welcome-brightgreen.svg?style=flat" alt="CONTRIBUTING /></a>
   <a href="./LICENSE"><img src="https://img.shields.io/badge/licence-MIT-blue.svg" alt="Licence MIT"/></a>