docs: add plugin setup guide

plugin/lib/commonlibf4/include/RE/C/ConsoleLog.h

@@ -0,0 +1,60 @@
+#pragma once
+
+#include "RE/B/BSStringT.h"
+#include "RE/B/BSTSingleton.h"
+
+namespace RE
+{
+	class ConsoleLog :
+		public BSTSingletonSDM<ConsoleLog>  // 00
+	{
+	public:
+		[[nodiscard]] static ConsoleLog* GetSingleton()
+		{
+			static REL::Relocation<ConsoleLog**> ptr{ ID::ConsoleLog::Singleton };
+			return *ptr;
+		}
+
+		void AddString(char const* a_str)
+		{
+			using func_t = decltype(&ConsoleLog::AddString);
+			static REL::Relocation<func_t> func{ ID::ConsoleLog::AddString };
+			return func(this, a_str);
+		}
+
+		// std::format rules, has compile time checking
+		template <class... Args>
+		void Log(const std::format_string<Args...> a_fmt, Args&&... a_args)
+		{
+			auto str = std::vformat(a_fmt.get(), std::make_format_args(a_args...));
+			str += '\n';
+			AddString(str.c_str());
+		}
+
+		// std::printf rules, no compile time checking
+		void Print(const char* a_fmt, std::va_list a_args)
+		{
+			using func_t = decltype(&ConsoleLog::Print);
+			static REL::Relocation<func_t> func{ ID::ConsoleLog::Print };
+			func(this, a_fmt, a_args);
+		}
+
+		void PrintLine(const char* a_fmt, ...)
+		{
+			std::va_list args;
+			va_start(args, a_fmt);
+			Print(a_fmt, args);
+			va_end(args);
+		}
+
+		void SetUseConsoleOverlay(bool a_value)
+		{
+			useConsoleOverlay = a_value;
+		}
+
+		// members
+		BSString buffer;             // 08
+		bool     useConsoleOverlay;  // 18
+	};
+	static_assert(sizeof(ConsoleLog) == 0x20);
+}