[Feature request] Screen rotate

[Lewewe]

Basically you can use this function to make the screen vertical to serve games that require vertical screen or use it for other purposes, I find this very good on Atermis Android so I also hope Moonlight-Switch can do something similar.
It is not necessary to force HOS to rotate vertically but the app only.
The reason I want it on Moonlight-Switch is because the connection on Android is very unstable and causes a lot of stutter, HOS gives much better results