End-of-Maintenance notice (#1094)

* Repository end-of-maintainence notice with referral to Adobe

Signed-off-by: Tim Swanson <[email protected]>

* Use caution callout

Signed-off-by: Tim Swanson <[email protected]>

---------

Signed-off-by: Tim Swanson <[email protected]>

Author: tiswanso

README.md

@@ -1,3 +1,8 @@
+> [!CAUTION]
+> **This repository is no longer maintained.**  Please consider Adobe's fork at [https://github.com/adobe/koperator/](https://github.com/adobe/koperator/)
+
+---
+
 <p align="center">
 
 ![Koperator](https://img.shields.io/github/v/release/banzaicloud/koperator?label=Koperator&sort=semver)
@@ -20,6 +25,8 @@
 
 </p>
 
+
+
 # Koperator
 
 Koperator is an open-source operator that automates the provisioning, management, and autoscaling of Apache Kafka clusters on Kubernetes.