update readme with archival notice

Signed-off-by: Per Goncalves da Silva <[email protected]>

README.md

@@ -1,5 +1,14 @@
 # RukPak
 
+---
+> [!WARNING]
+> This repository has been archived in August 2024.
+> The community is excited to be working on a new design for OLM (v1). As part of that effort, RukPak's functionality has been moved to v1's primary repository: [operator controller](https://www.github.com/operator-framework/operator-controller).
+
+If you have any questions, please engage with us: [![Slack Channel](https://img.shields.io/badge/chat-4A154B?logo=slack&logoColor=white "Slack Channel")](https://kubernetes.slack.com/archives/C0181L6JYQ2)
+
+---
+
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