feat(nativegen)!: refactor to struct-based native wrappers

Major overhaul of native wrapper generation for ufbx and nvtt.
Replaces all hand-written and class-based wrappers with auto-generated partial struct wrappers that directly expose native API methods via pointers. Introduces a new JSON-driven configuration system using "remaps" and "actions" for flexible parameter/return mapping and method routing. Removes legacy config sections and helper classes, focusing solely on method wrappers. Updates all usages and tests to use the new pointer-based API. Cleans up obsolete code and ensures resource management is handled via struct Dispose methods. The result is a thinner, more direct, and maintainable interop layer.

BREAKING CHANGE: All managed wrapper classes and helpers are removed in favor of struct-based pointer wrappers. API usage and resource management patterns have changed.

src/ThridParty/Ghost.Nvtt/Wrapper/NvttSurfaceSet.nativegen.cs

@@ -0,0 +1,107 @@
+// <auto-generated>
+// This file is generated by Ghost.NativeWrapperGen. Do not edit manually.
+// </auto-generated>
+
+namespace Ghost.Nvtt;
+
+public unsafe partial struct NvttSurfaceSet : System.IDisposable
+{
+    // From: nvttCreateSurfaceSet()
+    public static NvttSurfaceSet* Create()
+    {
+        return Api.nvttCreateSurfaceSet();
+    }
+
+    // From: nvttDestroySurfaceSet(NvttSurfaceSet*)
+    public void Dispose()
+    {
+        Api.nvttDestroySurfaceSet((NvttSurfaceSet*)System.Runtime.CompilerServices.Unsafe.AsPointer(ref this));
+    }
+
+    // From: nvttResetSurfaceSet(NvttSurfaceSet*)
+    public void Reset()
+    {
+        Api.nvttResetSurfaceSet((NvttSurfaceSet*)System.Runtime.CompilerServices.Unsafe.AsPointer(ref this));
+    }
+
+    // From: nvttSurfaceSetGetTextureType(NvttSurfaceSet*)
+    public NvttTextureType GetTextureType()
+    {
+        return Api.nvttSurfaceSetGetTextureType((NvttSurfaceSet*)System.Runtime.CompilerServices.Unsafe.AsPointer(ref this));
+    }
+
+    // From: nvttSurfaceSetGetFaceCount(NvttSurfaceSet*)
+    public int GetFaceCount()
+    {
+        return Api.nvttSurfaceSetGetFaceCount((NvttSurfaceSet*)System.Runtime.CompilerServices.Unsafe.AsPointer(ref this));
+    }
+
+    // From: nvttSurfaceSetGetMipmapCount(NvttSurfaceSet*)
+    public int GetMipmapCount()
+    {
+        return Api.nvttSurfaceSetGetMipmapCount((NvttSurfaceSet*)System.Runtime.CompilerServices.Unsafe.AsPointer(ref this));
+    }
+
+    // From: nvttSurfaceSetGetWidth(NvttSurfaceSet*)
+    public int GetWidth()
+    {
+        return Api.nvttSurfaceSetGetWidth((NvttSurfaceSet*)System.Runtime.CompilerServices.Unsafe.AsPointer(ref this));
+    }
+
+    // From: nvttSurfaceSetGetHeight(NvttSurfaceSet*)
+    public int GetHeight()
+    {
+        return Api.nvttSurfaceSetGetHeight((NvttSurfaceSet*)System.Runtime.CompilerServices.Unsafe.AsPointer(ref this));
+    }
+
+    // From: nvttSurfaceSetGetDepth(NvttSurfaceSet*)
+    public int GetDepth()
+    {
+        return Api.nvttSurfaceSetGetDepth((NvttSurfaceSet*)System.Runtime.CompilerServices.Unsafe.AsPointer(ref this));
+    }
+
+    // From: nvttSurfaceSetGetSurface(NvttSurfaceSet*, int, int, NvttBoolean)
+    public NvttSurface* GetSurface(int faceId, int mipId, NvttBoolean expectSigned)
+    {
+        return Api.nvttSurfaceSetGetSurface(
+            (NvttSurfaceSet*)System.Runtime.CompilerServices.Unsafe.AsPointer(ref this),
+            faceId,
+            mipId,
+            expectSigned);
+    }
+
+    // From: nvttSurfaceSetLoadDDS(NvttSurfaceSet*, sbyte*, NvttBoolean)
+    public NvttBoolean LoadDDS(ReadOnlySpan<byte> fileName, NvttBoolean forcenormal)
+    {
+        fixed (byte* pfileName = fileName)
+        {
+            return Api.nvttSurfaceSetLoadDDS(
+                (NvttSurfaceSet*)System.Runtime.CompilerServices.Unsafe.AsPointer(ref this),
+                (sbyte*)pfileName,
+                forcenormal);
+        }
+    }
+
+    // From: nvttSurfaceSetLoadDDSFromMemory(NvttSurfaceSet*, void*, ulong, NvttBoolean)
+    public NvttBoolean LoadDDSFromMemory(void* data, ulong sizeInBytes, NvttBoolean forcenormal)
+    {
+        return Api.nvttSurfaceSetLoadDDSFromMemory(
+            (NvttSurfaceSet*)System.Runtime.CompilerServices.Unsafe.AsPointer(ref this),
+            data,
+            sizeInBytes,
+            forcenormal);
+    }
+
+    // From: nvttSurfaceSetSaveImage(NvttSurfaceSet*, sbyte*, int, int)
+    public NvttBoolean SaveImage(ReadOnlySpan<byte> fileName, int faceId, int mipId)
+    {
+        fixed (byte* pfileName = fileName)
+        {
+            return Api.nvttSurfaceSetSaveImage(
+                (NvttSurfaceSet*)System.Runtime.CompilerServices.Unsafe.AsPointer(ref this),
+                (sbyte*)pfileName,
+                faceId,
+                mipId);
+        }
+    }
+}