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/Core/RootSignatureLayout.cs

@@ -28,23 +28,42 @@ namespace Ghost.Graphics.Core;
 /// </summary>
 public static class RootSignatureLayout
 {
-    public const int GLOBAL_BUFFER_SLOT = 0;
-    public const int PER_VIEW_BUFFER_SLOT = 1;
-    public const int PER_OBJECT_BUFFER_SLOT = 2;
-    public const int PER_MATERIAL_BUFFER_SLOT = 3;
+    // public const int GLOBAL_BUFFER_SLOT = 0;
+    // public const int PER_VIEW_BUFFER_SLOT = 1;
+    // public const int PER_OBJECT_BUFFER_SLOT = 2;
+    // public const int PER_MATERIAL_BUFFER_SLOT = 3;
 
-    public const int TEXTURE_HEAP_SLOT = 0;
-    public const int SAMPLER_HEAP_SLOT = 0;
+    // public const int TEXTURE_HEAP_SLOT = 0;
+    // public const int SAMPLER_HEAP_SLOT = 0;
 
-    public const int ROOT_PARAMETER_COUNT =
-#if USE_TRADITIONAL_BINDLESS
-    6
-#else
-    4
-#endif
-    ;
+    public const int PUSH_CONSTANT_SLOT = 0;
+
+    public const int ROOT_PARAMETER_COUNT = 1;
 }
 
+[StructLayout(LayoutKind.Sequential, Size = 16)]
+public struct PushConstantsData
+{
+    public uint globalIndex;
+    public uint viewIndex;
+    public uint objectIndex;
+    public uint materialIndex;
+}
+
+// The size should be 176 bytes (16-byte aligned)
+[StructLayout(LayoutKind.Sequential, Pack = 1)]
+public struct PerViewData
+{
+    public float4x4 viewMatrix;
+    public float4x4 projectionMatrix;
+    public float3 cameraPosition;
+    public float nearClip;
+    public float3 cameraDirection;
+    public float farClip;
+    public float4 screenSize; // xy: size, zw: 1/size
+};
+
+// The size should be 96 bytes (16-byte aligned)
 [StructLayout(LayoutKind.Sequential, Pack = 1)]
 public struct PerObjectData
 {
@@ -53,4 +72,4 @@ public struct PerObjectData
     public uint vertexBuffer;
     public float3 worldBoundsMax;
     public uint indexBuffer;
-};
+};