Add exec command

src/asset/asset.h

@@ -12,6 +12,7 @@
 
 #include "asset/type/assetpaletteimage.h"
 #include "asset/type/assetalphaimage.h"
+#include "asset/type/assetconfig.h"
 
 #define ASSET_HEADER_SIZE 3
 #define ASSET_REFERENCE_COUNT_MAX 8
@@ -31,6 +32,7 @@ typedef enum {
   ASSET_TYPE_UNKNOWN,
   ASSET_TYPE_PALETTE_IMAGE,
   ASSET_TYPE_ALPHA_IMAGE,
+  ASSET_TYPE_CONFIG,
 
   ASSET_TYPE_COUNT
 } assettype_t;
@@ -46,6 +48,7 @@ typedef struct asset_s {
   union {
     assetpaletteimage_t paletteImage;
     assetalphaimager_t alphaImage;
+    assetconfig_t config;
   };
 } asset_t;