dmnt2: add monitor get base, TODO responses for monitor wait *

stratosphere/dmnt.gen2/source/dmnt2_gdb_server_impl.hpp

@@ -98,6 +98,7 @@ namespace ams::dmnt {
 
             void qAttached();
             void qC();
+            void qRcmd();
             void qSupported();
             void qXfer();
             void qXferFeaturesRead();