feat(render): add meshlet rendering and ECS query ref API

Introduces meshlet-based rendering pipeline with new HLSL structures and push constant layouts. Refactors meshlet upload/cooking, updates RenderGraphContext for global/view/instance data, and enhances ECS QueryBuilder with ref returns and [UnscopedRef] for fluent chaining. Improves resource management and disposal patterns, updates D3D12 interop for compatibility, and refines test/app infrastructure. Includes dependency updates, bug fixes, and code cleanups.

src/Runtime/Ghost.Entities/Query.cs

@@ -636,6 +636,10 @@ public ref partial struct QueryBuilder : IDisposable
         {
             Dispose();
         }
+        else
+        {
+            Clear();
+        }
 
         return query;
     }