[i18n] start multilang support for webconsole

Signed-off-by: R4SAS <r4sas@i2pmail.org>

i18n/I18N.h

@@ -0,0 +1,39 @@
+/*
+* Copyright (c) 2021, The PurpleI2P Project
+*
+* This file is part of Purple i2pd project and licensed under BSD3
+*
+* See full license text in LICENSE file at top of project tree
+*/
+
+#ifndef __I18N_H__
+#define __I18N_H__
+
+namespace i2p {
+namespace i18n {
+
+	namespace russian {
+		std::string GetString (std::string arg);
+		std::string GetPlural (std::string arg, int n);
+	}
+
+	std::string translate (std::string arg)
+	{
+		return i2p::i18n::russian::GetString (arg);
+	}
+
+	template<typename inttype>
+	std::string translate (std::string arg, inttype&& n)
+	{
+		return i2p::i18n::russian::GetPlural (arg, (int) n);
+	}
+
+} // i18n
+} // i2p
+
+template<typename... TArgs>
+std::string tr (TArgs&&... args) {
+	return i2p::i18n::translate(std::forward<TArgs>(args)...);
+}
+
+#endif // __I18N_H__