chore: moose end of life statement in readme

Author: jmsuzuki

README.md

@@ -6,6 +6,10 @@
 [![Docs](https://img.shields.io/badge/Quickstart-Docs-blue.svg)](https://docs.fiveonefour.com/moosestack/getting-started/quickstart)
 [![MIT license](https://img.shields.io/badge/License-MIT-yellow.svg)](LICENSE)
 
+[!IMPORTANT] MooseStack has reached end of life and is no longer actively maintained.
+
+![MooseStack agent harness diagram](./eol-meme.png)
+
 # MooseStack
 
 **The developer agent harness for ClickHouse** — MooseStack gives your AI coding agents the interfaces, context, code, and skills to build and ship applications on popular OSS realtime analytical infrastructure: safely, efficiently, and effectively. Including: