chore: 清理旧版IUP库文件并更新头文件路径

删除旧的iup-3.31_Win64_dllw6_lib目录下的所有DLL和静态库文件
将IUP头文件从旧目录迁移到新的libs/IUP/include统一路径
更新CMakeLists.txt中的包含路径和库链接配置
简化DLL复制逻辑，只复制核心iup.dll文件

libs/IUP/include/iupglcontrols.h

@@ -0,0 +1,47 @@
+/** \file
+ * \brief GL Controls.
+ *
+ * See Copyright Notice in "iup.h"
+ */
+ 
+#ifndef __IUPGLCONTROLS_H 
+#define __IUPGLCONTROLS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+int  IupGLControlsOpen(void);
+
+Ihandle* IupGLCanvasBoxv(Ihandle** children);
+Ihandle* IupGLCanvasBox(Ihandle* child, ...);
+
+Ihandle* IupGLSubCanvas(void);
+
+Ihandle* IupGLLabel(const char* title);
+Ihandle* IupGLSeparator(void);
+Ihandle* IupGLButton(const char* title);
+Ihandle* IupGLToggle(const char* title);
+Ihandle* IupGLLink(const char *url, const char * title);
+Ihandle* IupGLProgressBar(void);
+Ihandle* IupGLVal(void);
+Ihandle* IupGLFrame(Ihandle* child);
+Ihandle* IupGLExpander(Ihandle* child);
+Ihandle* IupGLScrollBox(Ihandle* child);
+Ihandle* IupGLSizeBox(Ihandle* child);
+Ihandle* IupGLText(void);
+
+
+/* Utilities */
+void IupGLDrawImage(Ihandle* ih, const char* name, int x, int y, int active);
+void IupGLDrawText(Ihandle* ih, const char* str, int len, int x, int y);
+void IupGLDrawGetTextSize(Ihandle* ih, const char* str, int *w, int *h);
+void IupGLDrawGetImageInfo(const char* name, int *w, int *h, int *bpp);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif