Update main menu

[LetterN]

Update main menu + reshuffled Entrypoint

main menu (when launching on its own; not from launcher)

connecting menu

also soon ™️ other byond games that work on OD as background images (different on startup)

[wixoaGit]

Gotta be honest I don't like the circularly moving background much. I would prefer no movement, or at least something a lot more subtle.

[LetterN]

idea is the background to rotate on a central "thing" or a map from a game

[github-actions]

This pull request has conflicts, please resolve those before we can evaluate the pull request.

[github-actions]

This pull request has conflicts, please resolve those before we can evaluate the pull request.

[wixoaGit]

I don't like these changes to the main menu. It just moves things around, bolds some of the text, and adds a gray background that makes some things harder to read. I also think the background should be up to the codebase to set, and not be something included in OD's resources.

Any potential changes to the main menu I think should be put through some design with public input. The localization would be nice to have too, if we can get that in another PR.