feat: add __rpc

__rpc/dubbo-rust/src/greeter/client.rs

@@ -0,0 +1,23 @@
+use dubbo::codegen::Request;
+use crate::sample::greeter_client::GreeterClient;
+use crate::sample::GreeterRequest;
+
+mod sample;
+
+#[tokio::main]
+async fn main() {
+    let mut cli = GreeterClient::new().with_uri("http://127.0.0.1:8888".to_string());
+
+    println!("# unary call");
+    let resp = cli
+        .greet(Request::new(GreeterRequest {
+            name: "message from client".to_string(),
+        }))
+        .await;
+    let resp = match resp {
+        Ok(resp) => resp,
+        Err(err) => return println!("{:?}", err),
+    };
+    let (_parts, body) = resp.into_parts();
+    println!("Response: {:?}", body);
+}