bevy_winit(emit raw winit events)

[HugoPeters1024]

Objective

• Exposes raw winit events making Bevy even more modular and powerful for custom plugin developers (e.g. a custom render plugin).

XRef: #5977
It doesn't quite close the issue as sending events is not supported (or not very useful to be precise). I would think that supporting that requires some extra considerations by someone a bit more familiar with the bevy_winit crate. That said, this PR could be a nice step forward.

Solution

Emit RawWinitWindowEvent objects for each received event.

Testing

I verified that the events are emitted using a basic test app. I don't think it makes sense to solidify this behavior in one of the examples.

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Showcase

My example usage for a custom egui_winit integration:

for ev in winit_events.read() {
    if ev.0.window_id == window.id {
    let _ = egui_winit.on_window_event(&window, &ev.0.event);
    }
}

Migration Guide

No breaking changes.