Improve Multirun by providing better in game support

[gonzalologorg]

Details

Usually while running with multirun which is really helpful to test and iterate over multiplayer features, it really feels like it generates a second problem, which is trying to see what instance on what player are you actually running

Along showing PID (Which means nothing, as player #13820 it's player 2 while #19244 it's player 1), it would be really helpful that when you're in session, it shows:

• If you're the player with a valid steamid64 (as p#2 will be 0)
• Which index do you occupy with player.GetByID(x)
• Possibly nickname? (That would be AMAZING)

I understand how idiotic could be implementing a way to interact with windows title name from Lua as how exploitable it will become, aka discord status

But it would be a cool addition to multirun work's environment, won't make anyone code better, won't introduce any negative impact, it would just be a good QoL