Add support for managing iOS AirPlay in-app

[BlackHoleFox]

Is your feature request related to a problem? Please describe.

There is not currently, afaict, any way to manage which device playback happens on inside the iOS app itself. You have to swipe into the iOS/iPadOS system UI to manage AirPlay/casting.

Describe the solution you'd like

It would be great if there was a built-in button with the rest of the player's playback controls to open the "AirPlay menu" like what Apple's own apps, Spotify, etc have:

Describe alternatives you've considered

You can just swipe and tap in the system-provided UI to trigger the action, which isn't a big deal. This is a very low-concern feature request since its just a nicety that makes it fit in on the platform better.

Additional context

N/A

[benonymity]

I recall looking into this a while ago, and the challenge was that Apple standardizes the UI for Airplay, and having it pop up in the app wasn't very consistent with the rest of the UI. Maybe there's a way now to open the full-screen Airplay selector. Something worth looking into