Removes the previous `AppIcon.appiconset` bundle and replaces it with
all of the necessary asset slices to enable all of the Liquid Glass
variants of the app icon on iOS 26, while also preserving backwards
compatibility with older iOS versions.
<img width="1164" height="388" alt="LiquidGlass"
src="https://github.com/user-attachments/assets/7d6e7a90-3fe5-4853-9c63-35144359f49e"
/>
---------
Co-authored-by: Dean Herbert <pe@ppy.sh>
This allows using `-p:ApplicationVersion:1234.5.6` to specify a version
at build / publish time. Without removing it the plist file's value
always takes precedence.
I haven't found a way to disable LLVM, and the issue may potentially be
resolved (doesn't occur for me), so we might as well just remove the key
for now.