Add ai-battle cli

[wichern]

Adds an optional binary that runs headless (no UI) AI battles.
This can be useful when creating training data or testing new AIs.

I'm not sure if this is placed correctly or whether it should even be part of the master branch.
In any case, I would like your feedback on this tool. It aims to reuse as much of s25main as possible in order to create accurate replays.

[Flamefire]

Few remarks to fix compilation

This will likely glitch on Windows though:

   `printf("\x1b[%dA", 8 + world_.GetNumPlayers()); // Move cursor back up`

[wichern]

Few remarks to fix compilation

This will likely glitch on Windows though:

   `printf("\x1b[%dA", 8 + world_.GetNumPlayers()); // Move cursor back up`

You are right.

It seems that I could fix this by calling SetConsoleMode.
https://learn.microsoft.com/en-us/windows/console/setconsolemode

I will have to set up a windows build machine to test it.

[Flamefire]

It seems that I could fix this by calling SetConsoleMode. https://learn.microsoft.com/en-us/windows/console/setconsolemode

There is a condition that ENABLE_PROCESSED_OUTPUT only works for "WriteFile or WriteConsole".
I suggest you use the C++ streams everywhere but PrintState and for that implement a wrapper instead of printf calling vsprintf and passing the result to either std::puts or WriteConsole.

Something like

#ifdef WIN32
HANDLE setupStdOut()
{
  HANDLE h = GetStdHandle(STD_OUTPUT_HANDLE);
  SetConsoleMode(h, ENABLE_PROCESSED_OUTPUT);
  return h;
}
#endif

void printConsole(const char* fmt, ... )
{
   ...
   vsprintf(...)
#ifdef WIN32
  static auto h = setupStdOut();
  WriteConsole(h, formattedString);
#else
  std::puts(formattedString();
#endif
}

Core ideas:

• Use a local static variable to get the stdout handle and ensure the console mode is set exactly once
• Keep the code until std::puts/WriteConsole the same to be able to spot mistakes in formatting on both systems

BTW: #include <cstdio> is missing although it seemingly gets pulled in by an other header

[Flamefire]

I marked a few comments as "Optional", you can skip those if you want. If you fix the others (and CI passes) we can merge this.

[wichern]

I marked a few comments as "Optional", you can skip those if you want. If you fix the others (and CI passes) we can merge this.

Thank's a lot. I will try to apply the other suggestions as well.

[Flamefire]

ok, great!
There are 2 constness issues (Rule is: Use const always unless you really need to modify the variable/parameter)

CI fails due to 1 conversion issue and an unrelated issue with test replays on master which will be by #1676

[Flamefire]

Compiler complains about signed->unsigned.

1. use an optional and value_or(std::chrono...)
2. Or: const auto defaultSeed = static_cast<unsigned>(std::chrono::high_resolution_clock::now().time_since_epoch().count()) next to replay/savegame_path and use it here