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.Ufbx/Wrapper/ufbx_blend_deformer.nativegen.cs

@@ -0,0 +1,28 @@
+// <auto-generated>
+// This file is generated by Ghost.NativeWrapperGen. Do not edit manually.
+// </auto-generated>
+
+using System.Runtime.CompilerServices;
+
+namespace Ghost.Ufbx;
+
+public unsafe partial struct ufbx_blend_deformer
+{
+    // From: ufbx_get_blend_vertex_offset(ufbx_blend_deformer*, nuint)
+    public Misaki.HighPerformance.Mathematics.float3 get_blend_vertex_offset(nuint vertex)
+    {
+        return Api.ufbx_get_blend_vertex_offset(
+            (ufbx_blend_deformer*)System.Runtime.CompilerServices.Unsafe.AsPointer(ref this),
+            vertex);
+    }
+
+    // From: ufbx_add_blend_vertex_offsets(ufbx_blend_deformer*, Misaki.HighPerformance.Mathematics.float3*, nuint, float)
+    public void add_blend_vertex_offsets(Misaki.HighPerformance.Mathematics.float3* vertices, nuint num_vertices, float weight)
+    {
+        Api.ufbx_add_blend_vertex_offsets(
+            (ufbx_blend_deformer*)System.Runtime.CompilerServices.Unsafe.AsPointer(ref this),
+            vertices,
+            num_vertices,
+            weight);
+    }
+}