IO: added io.PlatformOpenInShellFn handler to open a link/folder/file in OS shell, added IMGUI_DISABLE_DEFAULT_SHELL_FUNCTIONS. (#7660)

imgui.h

@@ -28,7 +28,7 @@
 // Library Version
 // (Integer encoded as XYYZZ for use in #if preprocessor conditionals, e.g. '#if IMGUI_VERSION_NUM >= 12345')
 #define IMGUI_VERSION       "1.91.0 WIP"
-#define IMGUI_VERSION_NUM   19091
+#define IMGUI_VERSION_NUM   19092
 #define IMGUI_HAS_TABLE
 
 /*
@@ -2240,6 +2240,11 @@ struct ImGuiIO
     void        (*SetClipboardTextFn)(void* user_data, const char* text);
     void*       ClipboardUserData;
 
+    // Optional: Open link/folder/file in OS Shell
+    // (default to use ShellExecuteA() on Windows, system() on Linux/Mac)
+    void        (*PlatformOpenInShellFn)(ImGuiContext* ctx, const char* path);
+    void*       PlatformOpenInShellUserData;
+
     // Optional: Notify OS Input Method Editor of the screen position of your cursor for text input position (e.g. when using Japanese/Chinese IME on Windows)
     // (default to use native imm32 api on Windows)
     void        (*SetPlatformImeDataFn)(ImGuiViewport* viewport, ImGuiPlatformImeData* data);