Add link to iMCP in README

Signed-off-by: Mattt <[email protected]>

Author: mattt

README.md

@@ -2,6 +2,9 @@
 
 Swift implementation of the [Model Context Protocol][mcp] (MCP).
 
+> [!TIP]
+> To see it in action, check out the [iMCP app](https://iMCP.app/?ref=mcp-swift-sdk).
+
 ## Requirements
 
 - Swift 6.0+ / Xcode 16+
@@ -137,4 +140,4 @@ let (description, messages) = try await client.getPrompt(
 
 This project is licensed under the Apache License, Version 2.0.
 
-[mcp]: https://modelcontextprotocol.io
+[mcp]: https://modelcontextprotocol.io