Add render graph proof of concept and refactor graphics

Implemented a transient render graph system as a proof of concept, including resource aliasing, pass culling, and typed pass data. Added new project `Ghost.RenderGraph.Concept` targeting `.NET 10.0`.

Refactored graphics-related components:
- Simplified resource state transitions in `RenderingContext`.
- Improved resize handling in `GraphicsTestWindow`.
- Updated `D3D12GraphicsEngine` to streamline frame rendering.
- Enhanced `D3D12ResourceDatabase` and `D3D12SwapChain` for better resource management.

Added detailed documentation:
- `ALIASING.md` explains resource aliasing techniques.
- `API_DESIGN.md` outlines the render graph API design.

Updated solution to include the new render graph project.

Ghost.RenderGraph.Concept/RenderGraphExtensions.cs

@@ -0,0 +1,41 @@
+namespace Ghost.RenderGraph.Concept;
+
+public static class RenderGraphExtensions
+{
+    public static RenderGraphPassBuilder<TPassData> AddRenderPass<TPassData>(
+        this RenderGraph renderGraph,
+        string name,
+        out TPassData passData,
+        Action<RenderGraphPassBuilder<TPassData>> setup)
+        where TPassData : class, new()
+    {
+        var builder = renderGraph.AddRenderPass<TPassData>(name, out passData);
+        setup(builder);
+        builder.Dispose();
+        return builder;
+    }
+}
+
+public sealed class RenderGraphPassScope<TPassData> : IDisposable
+    where TPassData : class, new()
+{
+    private readonly RenderGraphPassBuilder<TPassData> _builder;
+    private readonly string _passName;
+
+    internal RenderGraphPassScope(RenderGraphPassBuilder<TPassData> builder, string passName)
+    {
+        _builder = builder;
+        _passName = passName;
+    }
+
+    public RenderGraphPassBuilder<TPassData> Builder => _builder;
+
+    public void Dispose()
+    {
+        // Commit the pass when the using block ends
+        if (_builder.RenderFunc != null)
+        {
+            _builder.Dispose();
+        }
+    }
+}