Add instruction prompt

[Hopson97]

When launching the game, it would nice if the terminal window outputted the controls before launching the client (And maybe a 'press enter to continue).

This would be done in the launchClient function of main.cpp

https://github.com/Hopson97/open-builder/blob/master/src/main.cpp#L154

[Hopson97]

Bonus: Make it so that it mentions default settings can be set using config.txt

[Hopson97]

Side note

Meant to be for when the client and server are ran separately, but to prevent the server timing out using the "launch both" option :,

Could pass a boolean to client launch function check how the application was started, so if it was started as standalone client (aka directly from int main) then it would ask the user to press enter to continue, othwise it would skip this and continue to launch

[mendoza]

I would love to help you out with this issue, it seems simple to start helping haha 😆

[mendoza]

What do you think about this @Hopson97 ?