Allow users to set the window's icon

Hello,

I just started using Bevy and I wanted to start experimenting a bit with a small project, I wanted to put an image as an icon in the game window, but I couldn't find how to do it, even searching in the documentation, I specify that I'm using version 0.3.0 of Bevy, is it me who missed something? Or is this feature not yet implemented?

If it is not implemented, would it be possible to just add a field to the WindowDescriptor resource to specify this icon as it is possible to do it for the window title ?

Thank you in advance for the answers

Start by reviewing the WindowDescriptor resource and the existing window-title configuration in Bevy 0.3. The issue requests an image field for the game window icon; done means users can provide an icon through that resource and the behavior is covered across the supported window backends. No specific source file or test is named in the issue.

Written by the indexing model from the issue text.