new-argparse: implement most of the root commands, fix issues

src/core/Console.cpp

@@ -25,6 +25,15 @@ namespace Console
         }
     }
 
+    void WriteFormat(const utf8 * format, ...)
+    {
+        va_list args;
+
+        va_start(args, format);
+        vfprintf(stdout, format, args);
+        va_end(args);
+    }
+
     void WriteLine()
     {
         puts("");