Log release/dev mode

src/main.rs

@@ -42,6 +42,12 @@ async fn main() {
         )
         .get_matches();
 
+    if cfg!(release) {
+        info!("Running in release mode");
+    } else {
+        info!("Running in dev mode");
+    }
+
     match matches.subcommand() {
         Some(("gen", _)) => {
             let _ = generate().await;