[Request] Incorporate features from the -mod fork

[01y]

Hello, I recently lost my Vita dev setup, so I can't keep up with new versions, however I was able to add a higher res mode and true analog joystick controls to the last version of vitaWolfen a while back. I think being able to set the virtual screen resolution to 640x302 instead of 320x200, makes optimal use of the vita's resources (it's just low enough to keep 60fps, but looks sharp). Would be nice to be able to select the resolution as an option at launch, but it's just hardcoded in right here

I also set up the joysticks to send analog control data, changes are spread out over a few files, which gives smooth feeling controls. Plus added options to give keys and change joystick sensitivity in the Dear ImGui interface
(comparison)

The changes are very few and simple, so I'm just opening an issue instead of a PR. Thanks for taking a look!