feat(cli): implements subcommands

src/grpc.rs

@@ -13,11 +13,6 @@ pub mod grpc_juno {
     tonic::include_proto!("juno");
 }
 
-#[async_trait]
-pub trait Connection {
-    async fn connect(&self) -> Result<(), Box<dyn Error>>;
-}
-
 /// Return true if the addr is already in use, false otherwise
 pub fn is_socket_in_use(addr: SocketAddr) -> bool {
     match TcpListener::bind(addr) {