Prepare work on Rust2.0 with async/tokio support

.editorconfig

@@ -13,3 +13,5 @@ indent_size = 2
 indent_size = 4
 [*.dart]
 indent_size = 2
+[*.rs]
+indent_size = 4

templates/Rust2.0/.gitignore

@@ -0,0 +1,2 @@
+target
+Cargo.lock

templates/Rust2.0/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "__name__"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+int-enum = "0.5.0"
+serde = { version = "1.0.147", features = ["derive"] }
+serde_json = "1.0.88"
+threadpool = "1.8.1"
+nanoid = "0.4.0"
+tokio = { version = "1.22.0", features = ["full"] }
+

templates/Rust2.0/src/lib.rs

@@ -0,0 +1,44 @@
+use nanoid::nanoid;
+use serde::{Deserialize, Serialize};
+use serde_json::Value;
+use std::boxed::Box;
+use std::collections::HashMap;
+use std::error::Error;
+use std::marker::PhantomData;
+use std::marker::Send;
+use std::sync::mpsc::{Receiver, Sender};
+use std::sync::{Arc, Mutex};
+use threadpool::ThreadPool;
+
+pub type Result<T> = std::result::Result<T, Box<dyn Error>>;
+
+#[derive(Serialize, Deserialize)]
+pub struct JRPCRequest {
+    pub jsonrpc: String,
+    pub id: Option<String>,
+    pub method: String,
+    pub params: Value,
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct JRPCError {
+    pub code: i64,
+    pub message: String,
+    pub data: Value,
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct JRPCResult {
+    pub jsonrpc: String,
+    pub id: String,
+    pub result: Value,
+    pub error: Option<JRPCError>,
+}
+
+struct JRPCServer {}
+
+impl JRPCServer {
+    fn handle(&self) -> () {}
+}
+
+struct JRPCServerService {}