add FilamentAsset methods

thermion_dart/native/include/c_api/TFilamentAsset.h

@@ -0,0 +1,24 @@
+#pragma once
+
+#include <utils/Entity.h>
+
+#include "APIExport.h"
+#include "APIBoundaryTypes.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+    EMSCRIPTEN_KEEPALIVE uint32_t FilamentAsset_getEntityCount(
+        TFilamentAsset *filamentAsset
+    );
+    EMSCRIPTEN_KEEPALIVE void FilamentAsset_getEntities(
+        TFilamentAsset *filamentAsset,
+        EntityId* out
+    );
+
+    
+#ifdef __cplusplus
+}
+#endif
+