Codechange: Let the compile generate the master command table out of templated command traits.

This is using a non-intrusive type-traits like templated system, which
allows compile-time validation that the command table and the command
enum match up.

src/misc_cmd.cpp

@@ -22,6 +22,7 @@
 #include "tile_map.h"
 #include "texteff.hpp"
 #include "core/backup_type.hpp"
+#include "misc_cmd.h"
 
 #include "table/strings.h"