refactor: use asset_type_t for ZoneDefinition

src/ZoneCommon/Game/IW5/AssetNameResolverIW5.h

@@ -0,0 +1,14 @@
+#pragma once
+
+#include "Zone/AssetNameResolver.h"
+
+namespace IW5
+{
+    class AssetNameResolver final : public HashMapBasedAssetNameResolver
+    {
+    public:
+        AssetNameResolver();
+        [[nodiscard]] GameId GetGameId() const override;
+        [[nodiscard]] std::optional<const char*> GetAssetTypeName(asset_type_t assetType) const override;
+    };
+} // namespace IW5