d3270d now manages to connect and login with commands from netcat

d3270-common/src/b3270/operation.rs

@@ -1,7 +1,7 @@
 use serde::{Deserialize, Serialize};
 
 // {"run":{"actions":[{"action":"Connect","args":["10.24.74.37:3270"]}]}}
-// {"run":{"actions":"Key(a)"}}
+// {"run":{"actions":[{"action":"Key","args":["a"]}]}}
 // Operations
 #[derive(Serialize, Deserialize, Debug, Hash, Eq, PartialEq, Clone)]
 #[serde(rename_all = "kebab-case")]