refactor: restructure light def dumper

src/ObjCommon/LightDef/LightDefCommon.cpp

@@ -0,0 +1,11 @@
+#include "LightDefCommon.h"
+
+#include <format>
+
+namespace light_def
+{
+    std::string GetFileNameForAsset(const std::string& assetName)
+    {
+        return std::format("lights/{}", assetName);
+    }
+} // namespace light_def

src/ObjCommon/LightDef/LightDefCommon.h

@@ -0,0 +1,8 @@
+#pragma once
+
+#include <string>
+
+namespace light_def
+{
+    std::string GetFileNameForAsset(const std::string& assetName);
+}