Add in-game support FSR on linux

[dipol0]

OS - Ubuntu 24.04
CPU - Ryzen 5 PRO 4560G with Radeon Vega 7 iGPU
Monitor FHD - 1920x1080

Can add in-game option support FSR native on linux, if it possible? I try play Alan Wake Remasterd with FSR enabled on Lutris (wine ge-proton) and its work (as wrapper):

[hemebond]

@dipol0 You can use r_viewscale to render the game at a different resolution to the window, e.g., r_viewscale 0.5 will render at half the resolution of the game window.