docs: add build, npm, and license badges to README (#787)

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: jesseturner21

README.md

@@ -1,6 +1,12 @@
 <div align="center">
   <h1>AgentCore CLI</h1>
-  <h2>Create, develop, and deploy AI agents to Amazon Bedrock AgentCore</h2>
+  <p><strong>Create, develop, and deploy AI agents to Amazon Bedrock AgentCore</strong></p>
+
+  <p>
+    <a href="https://github.com/aws/agentcore-cli/actions/workflows/build-and-test.yml"><img src="https://img.shields.io/github/actions/workflow/status/aws/agentcore-cli/build-and-test.yml?branch=main&label=build" alt="Build Status"></a>
+    <a href="https://www.npmjs.com/package/@aws/agentcore"><img src="https://img.shields.io/npm/v/@aws/agentcore" alt="npm version"></a>
+    <a href="LICENSE"><img src="https://img.shields.io/github/license/aws/agentcore-cli" alt="License"></a>
+  </p>
 </div>
 
 ## Overview