refactor: 重构项目结构为 MVS 多示例版本，添加 README 文档

MVS/VolumeRenderer/imgui.ini

@@ -0,0 +1,24 @@
+[Window][Scene View]
+Pos=0,20
+Size=880,480
+
+[Window][Hierarchy]
+Pos=0,20
+Size=200,480
+
+[Window][Inspector]
+Pos=1080,20
+Size=200,480
+
+[Window][Project]
+Pos=0,500
+Size=640,150
+
+[Window][Console]
+Pos=640,500
+Size=640,150
+
+[Window][Debug##Default]
+Pos=60,60
+Size=400,400
+