feat: 添加CommandList常量和DSV支持，完善RenderContext

run_demo.bat

@@ -1,3 +1,16 @@
 @echo off
-cd /d D:\Xuanchi\高斯泼溅\XCEngine\build\mvs\XCEngineDemo\Debug
-XCEngineDemo.exe
+cd /d D:\Xuanchi\高斯泼溅\XCEngine
+echo Starting XCEngineDemo...
+echo Current directory: %CD%
+echo.
+build\mvs\XCEngineDemo\Debug\XCEngineDemo.exe
+echo.
+echo Program exited with code: %ERRORLEVEL%
+echo.
+if exist XCEngineDemo.log (
+    echo === Log file contents ===
+    type XCEngineDemo.log
+) else (
+    echo No log file found
+)
+pause