mobile: add SetGameOptions to replace RunGameOptions

[hajimehoshi]

Operating System

• Windows
• macOS
• Linux
• FreeBSD
• OpenBSD
• Android
• iOS
• Nintendo Switch
• PlayStation 5
• Xbox
• Web Browsers

What feature would you like to be added?

RunGameOptions.StrictContextRestoration was added recently. There is no real use case to use this with ebiten.RunGameWithOptions, and this works only with mobile.SetGameWithOptions.

In order to improve UX, let's define SetGameOptions like this:

type SetGameOptions struct {
    RunGameOptions
    StrictContextRestoration bool
}

As this is a breaking change, let's do this in v3.

Why is this needed?

No response