chore: update readme

Author: hashemix

README.md

@@ -4,6 +4,13 @@
 
 # Rust MCP SDK
 
+[<img alt="crates.io" src="https://img.shields.io/crates/v/rust-mcp-sdk?style=for-the-badge&logo=rust&color=FE965D" height="22">](https://crates.io/crates/rust-mcp-sdk)
+[<img alt="docs.rs" src="https://img.shields.io/badge/docs.rs-rust_mcp_SDK-0ECDAB?style=for-the-badge&logo=docs.rs" height="22">](https://docs.rs/rust-mcp-sdk)
+[<img alt="build status" src="https://img.shields.io/github/actions/workflow/status/rust-mcp-stack/rust-mcp-sdk/ci.yml?style=for-the-badge" height="22">
+](https://github.com/rust-mcp-stack/rust-mcp-sdk/actions/workflows/ci.yml)
+[<img alt="Hello World MCP Server" src="https://img.shields.io/badge/Example-Hello%20World%20MCP-0286ba?style=for-the-badge&logo=rust" height="22">
+](examples/hello-world-mcp-server)
+
 A high-performance, asynchronous toolkit for building MCP servers and clients.  
 Focus on your app's logic while **rust-mcp-sdk** takes care of the rest!