add compatibility notice

Author: solverat

README.md

@@ -1,5 +1,21 @@
 # Pimcore - Dynamic Search
 
+***
+
+> [!IMPORTANT]
+> This bundle will **not** be compatible with Pimcore 12 or any future Pimcore versions.
+>
+> For all future development, updates, and documentation, please refer to [opendxp.io](https://www.opendxp.io):
+>
+> - Access the latest info here: [https://www.opendxp.io/en/bundles](https://www.opendxp.io/en/bundles)  
+> - Migration of Dachcom Digital Bundles: [https://www.opendxp.io/en/dachcom-bundles](https://www.opendxp.io/en/dachcom-bundles)
+>
+> **Note:** We are open to partnerships for those interested in porting this bundle to future versions.
+> 
+> For inquiries, please contact: dcdi@dachcom.ch
+
+***
+
 ![Dynamic Search Schema](https://user-images.githubusercontent.com/700119/61217991-3c550c00-a711-11e9-9f62-6f1fb4ff0e3e.png)
 
 [![Software License](https://img.shields.io/badge/license-GPLv3-brightgreen.svg?style=flat-square)](LICENSE.md)