pygame.Window.get_info()

[gresm]

Alternative to pygame.Window._handle (+extra).

[damusss]

I don't particurly like this, because:

• get_info does not describe what kind of info it is, and looks more important than the returned value
• there are a lot of properties that are basically useless, and they are inconsistent between sdl2/sdl3. this dict-like api feels "old" as pointed out by starbuck in my PR
• we are already having a hard time deciding if the window handle is worth it, whether all the many numbers are worth it would be even harder

[gresm]

@damusss That's completely understandable. Just note that this PR is more of "port pygame.display.get_wm_info", only that adding support for pygame.Window was trivial. The API is intentionally the same. Nonetheless, I'm open for suggestions.

IMHO, exposing window identifier is useful.