Print dotnet stack trace on veh error msgbox, and use precompiled headers.

Dalamud.Boot/pch.h

@@ -0,0 +1,41 @@
+// pch.h: This is a precompiled header file.
+// Files listed below are compiled only once, improving build performance for future builds.
+// This also affects IntelliSense performance, including code completion and many code browsing features.
+// However, files listed here are ALL re-compiled if any one of them is updated between builds.
+// Do not add files here that you will be updating frequently as this negates the performance advantage.
+
+#ifndef PCH_H
+#define PCH_H
+
+// Exclude rarely-used stuff from Windows headers
+#define WIN32_LEAN_AND_MEAN 
+
+// Windows Header Files
+#include <windows.h>
+#include <DbgHelp.h>
+#include <PathCch.h>
+#include <Psapi.h>
+#include <Shlobj.h>
+#include <TlHelp32.h>
+
+// C++ Standard Libraries
+#include <cassert>
+#include <cstdio>
+#include <filesystem>
+#include <format>
+#include <fstream>
+#include <span>
+#include <mutex>
+
+// https://github.com/dotnet/coreclr
+#include "..\lib\CoreCLR\CoreCLR.h"
+#include "..\lib\CoreCLR\boot.h"
+
+// Commonly used macros
+#define DllExport extern "C" __declspec(dllexport)
+
+// Global variables
+extern HMODULE g_hModule;
+extern std::optional<CoreCLR> g_clr;
+
+#endif //PCH_H