Add NSIS plugin support and extraction functionality

- Implemented plugin API in `pluginapi.cpp` and `pluginapi.h` for NSIS integration.
- Added resource files `resource.h` and `resource.rc` for versioning and resource management.
- Created `ExtractCallbackConsole` class to handle extraction progress and user input.
- Developed main extraction logic in `Main.cpp` and `MainAr.cpp` for handling archives.
- Introduced user input utilities in `UserInputUtils2.cpp` and `UserInputUtils2.h` for password handling and user prompts.
- Added break signal handling in `NSISBreak.cpp` and `NSISBreak.h` for graceful interruption of extraction processes.
- Included standard header `StdAfx.h` for precompiled headers and common includes.

versions/zstd/CPP/7zip/UI/NSIS/NSISBreak.h

@@ -0,0 +1,16 @@
+#ifndef __NSISBREAKUTILS_H
+#define __NSISBREAKUTILS_H
+
+namespace NNSISBreak {
+
+bool TestBreakSignal();
+void SendBreakSignal();
+
+class CCtrlBreakException
+{};
+
+void CheckCtrlBreak();
+
+}
+
+#endif