Refactor: add command allocator & render target strategies

Major refactor of graphics infrastructure:
- Introduce ICommandAllocator and D3D12CommandAllocator for explicit command buffer management.
- Change ICommandBuffer.Begin to require an allocator.
- Add IRenderTargetStrategy abstraction with swap chain and texture implementations.
- Update IRenderer to use RenderTargetStrategy instead of direct handle.
- Add DPI scaling support to swap chains (ScaleX/ScaleY, SetScale).
- RenderSystem now supports thread-safe swap chain resize requests.
- Remove persistent copy command buffer; use per-frame allocators.
- Make Logger public/static and clean up API visibility.
- Update .editorconfig and debug layer enablement.
These changes improve modularity, DPI-awareness, and future extensibility.

Ghost.Graphics/Core/RenderTargetStrategy.cs

@@ -0,0 +1,62 @@
+using Ghost.Core;
+using Ghost.Graphics.Contracts;
+using Ghost.Graphics.RHI;
+
+namespace Ghost.Graphics.Core;
+
+internal class SwapChainTargetStrategy : IRenderTargetStrategy
+{
+    private readonly ISwapChain _swapChain;
+
+    public SwapChainTargetStrategy(ISwapChain swapChain)
+    {
+        _swapChain = swapChain;
+    }
+
+    public Handle<Texture> GetRenderTarget()
+    {
+        return _swapChain.GetCurrentBackBuffer();
+    }
+
+    public void BeginRender(ICommandBuffer cmd)
+    {
+        cmd.ResourceBarrier(GetRenderTarget().AsResource(), ResourceState.Present, ResourceState.RenderTarget);
+    }
+
+    public void EndRender(ICommandBuffer cmd)
+    {
+        cmd.ResourceBarrier(GetRenderTarget().AsResource(), ResourceState.RenderTarget, ResourceState.Present);
+    }
+
+    public void Present()
+    {
+        _swapChain.Present();
+    }
+}
+
+internal class TextureTargetStrategy : IRenderTargetStrategy
+{
+    private readonly Handle<Texture> _texture;
+
+    public TextureTargetStrategy(Handle<Texture> texture)
+    {
+        _texture = texture;
+    }
+
+    public Handle<Texture> GetRenderTarget()
+    {
+        return _texture;
+    }
+
+    public void BeginRender(ICommandBuffer cmd)
+    {
+    }
+
+    public void EndRender(ICommandBuffer cmd)
+    {
+    }
+
+    public void Present()
+    {
+    }
+}