Refactor: variant-aware shader/material pipeline overhaul

Major architectural update to graphics/material/shader system:
- Introduced strongly-typed key structs (Key64/Key128) for passes, variants, and pipelines; removed legacy key types.
- Implemented robust hashing and key generation utilities for efficient variant and pipeline lookup/caching.
- Shader compiler now compiles/caches all keyword variants using new key system; includes handled as lists.
- Switched to push constant root signature for per-draw data; updated HLSL and C# codegen accordingly.
- Refactored Material, Shader, and Pass data structures for cache efficiency and variant support.
- Pipeline library and PSO management now use 128-bit keys and variant-specific caching.
- Replaced WorldNode with SceneNode in editor/scene graph; introduced ComponentManager for archetype/query management.
- Migrated math utilities to Misaki.HighPerformance.Mathematics; updated editor controls.
- Updated all HLSL and codegen for new buffer/push constant layouts and macros.
- Misc: project reference cleanup, D3D12 Work Graph support, doc updates, and code modernization.

Ghost.Graphics/D3D12/D3D12CommandBuffer.cs

@@ -486,7 +486,7 @@ internal unsafe class D3D12CommandBuffer : ICommandBuffer
         _commandList.Get()->RSSetViewports(1, &d3d12Viewport);
     }
 
-    public void SetPipelineState(GraphicsPipelineKey pipelineKey)
+    public void SetPipelineState(Key128<GraphicsPipeline> pipelineKey)
     {
         ThrowIfDisposed();
         ThrowIfNotRecording();
@@ -601,6 +601,24 @@ internal unsafe class D3D12CommandBuffer : ICommandBuffer
         _commandList.Get()->IASetPrimitiveTopology(d3d12Topology);
     }
 
+    public void SetGraphicsRoot32Constants(uint rootIndex, ReadOnlySpan<uint> constantBuffer, uint offsetIn32Bits = 0)
+    {
+        ThrowIfDisposed();
+        ThrowIfNotRecording();
+#if !DEBUG
+        if (_lastError.Status != ErrorStatus.None)
+        {
+            return;
+        }
+#endif
+        IncrementCommandCount();
+
+        fixed (uint* pConstants = constantBuffer)
+        {
+            _commandList.Get()->SetGraphicsRoot32BitConstants(rootIndex, (uint)constantBuffer.Length, pConstants, offsetIn32Bits);
+        }
+    }
+
     public void Draw(uint vertexCount, uint instanceCount = 1, uint startVertex = 0, uint startInstance = 0)
     {
         ThrowIfDisposed();
@@ -672,6 +690,32 @@ internal unsafe class D3D12CommandBuffer : ICommandBuffer
         // _device.Get()->DispatchRays();
     }
 
+    public void DispatchGraph()
+    {
+        throw new NotImplementedException();
+    }
+
+    public void ExecuteIndirect(Handle<GraphicsBuffer> argumentBuffer, ulong argumentOffset, Handle<GraphicsBuffer> countBuffer, ulong countBufferOffset)
+    {
+        throw new NotImplementedException();
+
+        ThrowIfDisposed();
+        ThrowIfNotRecording();
+#if !DEBUG
+        if (_lastError.Status != ErrorStatus.None)
+        {
+            return;
+        }
+#endif
+
+        IncrementCommandCount();
+        var resource = _resourceDatabase.GetResource(argumentBuffer.AsResource());
+        var countResource = _resourceDatabase.GetResource(countBuffer.AsResource());
+        _commandList.Get()->ExecuteIndirect(null, 0,
+            resource, argumentOffset, countResource, countBufferOffset);
+
+    }
+
     public void UploadBuffer<T>(Handle<GraphicsBuffer> buffer, ReadOnlySpan<T> data)
         where T : unmanaged
     {