add: response macros

add: preparation for more macro endpoints

include/models/macro_action.h

@@ -12,6 +12,9 @@ typedef struct
 int
 macro_action_insert(macro_action_t *macro_action);
 
+int
+macro_action_delete_for_macro(int macro_id);
+
 macro_action_t**
 macro_action_get_for_macro(int macro_id);