Auto PiP on iOS / iPadOS

[jose-elias-alvarez]

Is your feature request related to a problem? Please describe. On mobile devices, I often want to switch apps while watching a stream, but I want the video to keep playing in the background / until I return to full screen.

Describe the solution you'd like It'd be great if Frosty supported automatic PiP on iOS and iPadOS, like the official app. It would also improve the multitasking experience on iPadOS.

Describe alternatives you've considered It's not a huge hassle to press the PiP button before switching, but it does add friction, especially when switching back and forth.

Additional context This comment explains why PiP was added to Android but not iOS in #218, but the wording implies that this might become possible in the future, so I wonder if the situation has changed.

I don't have any experience with Flutter development, but if there's anything I can do, I'd be happy to pitch in where I can.