Created intermediate enum for events

[VictorKoenders]

• Adds an Event enum that also gets send to the EventHandler
• Adds a way to get the total elapsed time since the game started; app.timer.total_time()
• Adds a way to get a reference to the underlying glow handle
  • I needed to make this an Arc<> for https://docs.rs/egui_glow/latest/egui_glow/painter/struct.Painter.html#method.new
• Added a new event WindowResized that gets triggered when a window gets resized
• Made Gamepad a wrapper around Rc<GamepadInner> so this could be cloneable (since it's used in Event)
• Added Keys RightShift, RightCtrl, RightAlt, LeftCommand, and RightCommand

[17cupsofcoffee]

Sorry for delay on reviewing this, dayjob has been a bit crazy recently! I will try to get to it soon :)

[VictorKoenders]

No worries, take your time!

[17cupsofcoffee]

This all looks like reasonable changes to me - the only bit I'm mulling over slightly is the controller events returning joystick IDs (as there's nowhere else in the API you can actually use those - all the Input methods take a zero-indexed gamepad ID, so that you can just say 'gamepad 0' to get the first one that was plugged in).

It's a bit of a chicken and egg problem though, as at the point we convert from SDL event to our Event, we haven't assigned those gamepad IDs yet! So maybe it does make sense this way...

I'll give it some thought, and if I don't have any better ideas I'll merge as is 🙂

[17cupsofcoffee]

I'm going to go with this as-is for now - can always tweak it later if I figure out a different approach to the gamepad stuff.

Thanks for the PR (and the patience waiting weeks for me to review it 😅)

[VictorKoenders]

Don't worry about it, thank you for making nova! 🙂