[Feature Request] Add zoom option

[SaltyBet]

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

Describe the solution you'd like

moonlight-android has a stretch option, which tries to fill the display by stretching the video either vertically or horizontally.

I'd like to request a zoom option, for moonlight-qt and moonlight-android.

For example, rendering at 16:9 ratio on a 8:5 ratio screen shows black bars on the top and on the bottom:

The stretch option would look like this:

The requested option should allow to zoom the 16:9 image to fill the 8:5 display area, hiding a bit of the left and right borders:

Describe alternatives you've considered N/A

Additional context N/A

[trudnorx]

This + add a key to customize the level of zooming

[awdrifter]

Yes, this option is very needed for people with 21:9 monitors.