feat: add examples

__enclave/virt_enclave/src/rpc.rs

@@ -0,0 +1,17 @@
+use serde::{ Serialize, Deserialize };
+
+#[derive(Serialize, Deserialize)]
+pub struct InvokeRequest {
+    hash: String,
+    method: String,
+    params: String, // JSON, empty: []
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct InvokeResponse {
+    request_id: String,
+    hash: String,
+    method: String,
+    result: String,
+}
+