Add IW4 asset loader classes for all asset types that did not have one yet

src/ObjLoading/Game/IW4/AssetLoaders/AssetLoaderGfxLightDef.cpp

@@ -0,0 +1,17 @@
+#include "AssetLoaderGfxLightDef.h"
+
+#include <cstring>
+
+#include "ObjLoading.h"
+#include "Game/IW4/IW4.h"
+#include "Pool/GlobalAssetPool.h"
+
+using namespace IW4;
+
+void* AssetLoaderGfxLightDef::CreateEmptyAsset(const std::string& assetName, MemoryManager* memory)
+{
+    auto* lightDef = memory->Create<GfxLightDef>();
+    memset(lightDef, 0, sizeof(GfxLightDef));
+    lightDef->name = memory->Dup(assetName.c_str());
+    return lightDef;
+}