Update README to include a disclaimer (#32)

Author: winor30

README.md

@@ -1,5 +1,7 @@
 # Datadog MCP Server
 
+> **DISCLAIMER**: This is a community-maintained project and is not officially affiliated with, endorsed by, or supported by Datadog, Inc. This MCP server utilizes the Datadog API but is developed independently as part of the [Model Context Protocol](https://github.com/modelcontextprotocol/servers) ecosystem.
+
 ![NPM Version](https://img.shields.io/npm/v/%40winor30%2Fmcp-server-datadog)![Build and Test](https://github.com/winor30/mcp-server-datadog/actions/workflows/ci.yml/badge.svg)[![codecov](https://codecov.io/gh/winor30/mcp-server-datadog/graph/badge.svg?token=BG4ZB74X92)](https://codecov.io/gh/winor30/mcp-server-datadog)[![smithery badge](https://smithery.ai/badge/@winor30/mcp-server-datadog)](https://smithery.ai/server/@winor30/mcp-server-datadog)
 
 MCP server for the Datadog API, enabling incident management and more.