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_cache_channel.nativegen.cs

@@ -0,0 +1,32 @@
+// <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_cache_channel
+{
+    // From: ufbx_sample_geometry_cache_real(ufbx_cache_channel*, double, float*, nuint, ufbx_geometry_cache_data_opts*)
+    public nuint sample_geometry_cache_real(double time, float* data, nuint num_data, ufbx_geometry_cache_data_opts* opts)
+    {
+        return Api.ufbx_sample_geometry_cache_real(
+            (ufbx_cache_channel*)System.Runtime.CompilerServices.Unsafe.AsPointer(ref this),
+            time,
+            data,
+            num_data,
+            opts);
+    }
+
+    // From: ufbx_sample_geometry_cache_vec3(ufbx_cache_channel*, double, Misaki.HighPerformance.Mathematics.float3*, nuint, ufbx_geometry_cache_data_opts*)
+    public nuint sample_geometry_cache_vec3(double time, Misaki.HighPerformance.Mathematics.float3* data, nuint num_data, ufbx_geometry_cache_data_opts* opts)
+    {
+        return Api.ufbx_sample_geometry_cache_vec3(
+            (ufbx_cache_channel*)System.Runtime.CompilerServices.Unsafe.AsPointer(ref this),
+            time,
+            data,
+            num_data,
+            opts);
+    }
+}