fix: Attach to the console on Windows

[certik]

This makes std::cout working again after switching to a GUI application in #2067. It still does not open a console when launched from the Windows Explorer, but when launched from a terminal, it will now print to the terminal again, as before.

[certik]

I tested on Windows natively (in a shell) and on Linux (in WSL) and it works for me in both.

[baszalmstra]

This seems rather complex for an example. Is this worth having the ability to start the built executable from outside pixi?

Instead of std::cout we could also use https://wiki.libsdl.org/SDL2/SDL_ShowSimpleMessageBox perhaps?

[certik]

The std::cout is used for error messages if SDL cannot be initialized, so probably we can't use SDL itself to show the error.

Yes, it's quite complex, so maybe not worth doing. This seems to be the right approach to get it fully working on Windows, so I posted it here.

Regarding the ability to start outside of pixi, I would say that depends on what the goal of pixi is: is it supposed to create standalone executables that run on their own, or is the goal to always require pixi to setup the proper environment?