Add new format string function for non-constant string

[G-Moris]

Error:

message = std::format(_("Connecting to {0}:{1} ..."), m_strHost, m_usPort);

Decision:

message = mtasa::format(_("Connecting to {0}:{1} ..."), m_strHost, m_usPort);

I modified CConnectManager.cpp to include an example of how it works. If that’s a problem, I can remove the changes I made to it.

[botder]

With the introduction of placeholders {} you should start using the index, for example {0} to refer to arguments, when you're formatting a translatable string. This allows translators to reposition the arguments without breaking the formatting operation.