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.Entities/EntityManager.Managed.cs

@@ -108,7 +108,7 @@ public partial class EntityManager
         where T : ScriptComponent, new()
     {
         var location = _entityLocations.GetElementAt(entity.ID, entity.Generation);
-        ref var archetype = ref _world.GetArchetypeReference(location.archetypeID);
+        ref var archetype = ref _world.ComponentManager.GetArchetypeReference(location.archetypeID);
 
         var pManagedEntityRef = (ManagedEntityRef*)archetype.GetComponentData(location.chunkIndex, location.rowIndex, ComponentTypeID<ManagedEntityRef>.Value);
         if (pManagedEntityRef == null)