Feat/#20 telnet trait

judge-control-app/src/main.rs

@@ -1,4 +1,5 @@
 mod custom_file;
+mod telnet;
 
 fn main() {
     println!("Hello, world!");

judge-control-app/src/telnet.rs

@@ -0,0 +1 @@
+pub mod traits;

judge-control-app/src/telnet/traits.rs

@@ -0,0 +1,8 @@
+use anyhow::Result;
+use std::future::Future;
+use std::net::ToSocketAddrs;
+
+pub trait Telnet {
+    fn new<Addr: ToSocketAddrs>(addr: Addr) -> Self;
+    fn exec(&mut self, cmd: &str) -> impl Future<Output = Result<String>>;
+}