Render graph: native pass merging & heap-based aliasing

Major architecture upgrade:
- Add native render pass merging (hardware pass grouping, load/store op inference)
- Implement heap-based aliasing for textures & buffers (D3D12-style)
- Unify resource model: buffers and textures in one registry
- Extend builder API for buffer creation/usage, access flags, hints
- Improve barrier/state tracking (buffer hints, indirect argument state)
- Update caching, hashing, and debug output for new model
- Add enums/structs: AttachmentLoadOp, StoreOp, BufferHint, etc.
- D3D12 backend: support named resources, temp upload buffers, correct heap usage
- Update docs, benchmarks, and project files for new features

Brings render graph closer to AAA engine standards, enabling efficient memory usage, lower driver overhead, and a more flexible API.

Ghost.RenderGraph.Concept/RenderGraphBarriers.cs

@@ -19,6 +19,7 @@ public enum ResourceState
     CopySource = 1 << 5,
     CopyDest = 1 << 6,
     Present = 1 << 7,
+    IndirectArgument = 1 << 8,
 }
 
 /// <summary>
@@ -140,14 +141,14 @@ internal struct ResourceBarrier
 /// </summary>
 internal sealed class ResourceStateTracker
 {
-    public int ResourceIndex;
-    public ResourceState CurrentState = ResourceState.Common;
-    public int LastAccessPass = -1;
+    public int resourceIndex;
+    public ResourceState currentState = ResourceState.Common;
+    public int lastAccessPass = -1;
 
     public void Reset()
     {
-        ResourceIndex = -1;
-        CurrentState = ResourceState.Common;
-        LastAccessPass = -1;
+        resourceIndex = -1;
+        currentState = ResourceState.Common;
+        lastAccessPass = -1;
     }
 }