fix(examples): add servers in examples's readme (#229)

Signed-off-by: jokemanfire <hu.dingyang@zte.com.cn>

examples/servers/src/counter_streamhttp.rs

@@ -0,0 +1,29 @@
+use rmcp::transport::streamable_http_server::axum::StreamableHttpServer;
+use tracing_subscriber::{
+    layer::SubscriberExt,
+    util::SubscriberInitExt,
+    {self},
+};
+mod common;
+use common::counter::Counter;
+
+const BIND_ADDRESS: &str = "127.0.0.1:8000";
+
+#[tokio::main]
+async fn main() -> anyhow::Result<()> {
+    tracing_subscriber::registry()
+        .with(
+            tracing_subscriber::EnvFilter::try_from_default_env()
+                .unwrap_or_else(|_| "debug".to_string().into()),
+        )
+        .with(tracing_subscriber::fmt::layer())
+        .init();
+
+    let ct = StreamableHttpServer::serve(BIND_ADDRESS.parse()?)
+        .await?
+        .with_service(Counter::new);
+
+    tokio::signal::ctrl_c().await?;
+    ct.cancel();
+    Ok(())
+}