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/ResourceLifetime.cs

@@ -0,0 +1,35 @@
+namespace Ghost.RenderGraph.Concept;
+
+internal class ResourceUsage
+{
+    public RenderGraphResourceHandle Handle { get; }
+    public ResourceState State { get; }
+    public int PassIndex { get; }
+
+    public ResourceUsage(RenderGraphResourceHandle handle, ResourceState state, int passIndex)
+    {
+        Handle = handle;
+        State = state;
+        PassIndex = passIndex;
+    }
+}
+
+internal class ResourceLifetime
+{
+    public RenderGraphResourceHandle Handle { get; }
+    public int FirstUse { get; set; } = int.MaxValue;
+    public int LastUse { get; set; } = -1;
+    public List<ResourceUsage> Usages { get; } = new();
+
+    public ResourceLifetime(RenderGraphResourceHandle handle)
+    {
+        Handle = handle;
+    }
+
+    public void AddUsage(ResourceState state, int passIndex)
+    {
+        Usages.Add(new ResourceUsage(Handle, state, passIndex));
+        FirstUse = Math.Min(FirstUse, passIndex);
+        LastUse = Math.Max(LastUse, passIndex);
+    }
+}