Docs: add the Firebase MCP server info to README (#9412)

Author: charlotteliang

README.md

@@ -1,6 +1,6 @@
-# Firebase CLI [![Actions Status][gh-actions-badge]][gh-actions] [![Node Version][node-badge]][npm] [![NPM version][npm-badge]][npm] [![Install MCP Server](https://cursor.com/deeplink/mcp-install-dark.svg)](https://cursor.com/en/install-mcp?name=firebase&config=eyJjb21tYW5kIjoibnB4IiwiYXJncyI6WyIteSIsImZpcmViYXNlLXRvb2xzIiwiZXhwZXJpbWVudGFsOm1jcCIsIi0tZGlyIiwiLiJdfQ==)
+# Firebase CLI and MCP Server [![Actions Status][gh-actions-badge]][gh-actions] [![Node Version][node-badge]][npm] [![NPM version][npm-badge]][npm] [![Install MCP Server](https://cursor.com/deeplink/mcp-install-dark.svg)](https://cursor.com/en/install-mcp?name=firebase&config=eyJjb21tYW5kIjoibnB4IiwiYXJncyI6WyIteSIsImZpcmViYXNlLXRvb2xzIiwiZXhwZXBpbWVudGFsOm1jcCIsIi0tZGlyIiwiLiJdfQ==)
 
-The Firebase Command Line Interface (CLI) Tools can be used to test, manage, and deploy your Firebase project from the command line.
+The Firebase Command Line Interface (CLI) Tools can be used to test, manage, and deploy your Firebase project from the command line. This repository is also the home of the official Firebase MCP Server. For more information, please see the [Firebase MCP Server documentation](./src/mcp).
 
 - Deploy code and assets to your Firebase projects
 - Run a local web server for your Firebase Hosting site