feat: add windows function helper

- add windows function helper namespace for some commonly used windows functions.
- add corresponding testbench for added code.

src/WinFctHelper.hpp

@@ -0,0 +1,43 @@
+#pragma once
+#include "YYCCInternal.hpp"
+#if YYCC_OS == YYCC_OS_WINDOWS
+
+#include <string>
+
+#include "WinImportPrefix.hpp"
+#include <Windows.h>
+#include "WinImportSuffix.hpp"
+
+namespace YYCC::WinFctHelper {
+	
+	/**
+	 * @brief Get Windows used HANDLE for current module.
+	 * @details
+	 * If your target is EXE, the current module simply is your program self.
+	 * However, if your target is DLL, the current module is your DLL, not the EXE loading your DLL.
+	 * \n
+	 * This function is frequently used by DLL.
+	 * Because some design need the HANDLE of current module, not the host EXE loading your DLL.
+	 * For example, you may want to get the name of your built DLL at runtime, then you should pass current module HANDLE, not the HANDLE of EXE.
+	 * Or, if you want to get the path to your DLL, you also should pass current module HANDLE.
+	 * @return A Windows HANDLE pointing to current module, NULL if failed.
+	*/
+	HMODULE GetCurrentModule();
+
+	/**
+	 * @brief Get path to Windows temp folder.
+	 * @return UTF8 encoded path to Windows temp folder. Empty string if failed.
+	*/
+	std::string GetTempDirectory();
+
+	/**
+	 * @brief Get the file name of given module HANDLE
+	 * @param hModule[in] 
+	 * The HANDLE to the module where we want get file name.
+	 * It is same as the HANDLE parameter of GetModuleFileName.
+	 * @return UTF8 encoded file name of given module. Empty string if failed.
+	*/
+	std::string GetModuleName(HINSTANCE hModule);
+}
+
+#endif