warn on unhandled irc message

src/projections/irc/mod.rs

@@ -333,8 +333,10 @@ async fn handle_incoming_message(
                     }
                     Chan::Local(_) => {}
                 };
+            },
+            cmd => {
+                log::warn!("Not implemented handler for client command: {cmd:?}");
             }
-            _ => {}
         },
         Err(err) => {
             log::warn!("Failed to parse IRC message: {err}");