Add mappings for languages not given by libicu

Adds a std::map<std::string, std::string> with display names for language codes not given by libicu
Fault language codes are taken from library.kiwix.org

src/server/internalServer.cpp

@@ -146,7 +146,6 @@ bool InternalServer::start() {
   if (m_verbose.load())
     flags |= MHD_USE_DEBUG;
 
-
   struct sockaddr_in sockAddr;
   memset(&sockAddr, 0, sizeof(sockAddr));
   sockAddr.sin_family = AF_INET;