docs(readme): add side project notice (#7)

## Added
- A top-of-README notice clarifying the project is shared as-is.

## Changed
- Added an Apache-2.0 license annotation to the Helm chart metadata.

Author: kgrubb

README.md

@@ -1,3 +1,6 @@
+> ⚠️ **Notice**  
+> This repo is a small, experimental project built for fun and learning. It’s shared publicly **as-is** with no promised support, roadmap, or guarantees.
+
 <div align="center">
   <img src="assets/kaytoo.png" alt="Kaytoo logo" width="180" />
 

helm/kaytoo/Chart.yaml

@@ -4,3 +4,5 @@ description: Kaytoo - Slack + OpenSearch insight bot
 type: application
 version: 0.1.1
 appVersion: "0.1.1"
+annotations:
+  artifacthub.io/license: Apache-2.0