iOS Resolution Selection with External Display

![image](https://github.com/user-attachments/assets/94b52563-a10b-4eb4-b42f-a26cf2166be1)

https://discord.com/channels/627187835945877505/627187836441067533/1320307732703875155 :
```
foma: Now the only feature remaining that
I'd really love is ability to pick a certain resolution for external monitor, like in mame4ios.
Whatever ipad outputs by default isn't ideal
```