Add config and basic architecture for QUIC

substrate/src/transport/server.rs

@@ -0,0 +1,8 @@
+use tokio::sync::mpsc::Sender;
+use crate::transport::QuicMessage;
+
+pub async fn run_substrate_server(t1_tx: Sender<QuicMessage>,
+                        t2_tx: Sender<QuicMessage>,
+                        t3_tx: Sender<QuicMessage>) {
+    
+}