psHUD_FOV refactors

Открыто xottab-duty запросил слияние refactor/hud-fov в dev

Created by: yohjimane

  • Expose psHUD_FOV to users as degree value instead of radians
  • renamed psHUD_FOV to g_hud_fov
  • Add HUD_VIEWPORT_NEAR define, to fix camera clipping with high hud fov values