Files and Paths
	•	Installer script
  
		WOPR.sh (this repo)
    
	•	Generated launchers
  
		~/.local/share/steam-launcher/enter-gamesmode
		~/.local/share/steam-launcher/leave-gamesmode
    
	•	Session state
  
		~/.cache/gaming-session/session.pid
		~/.cache/gaming-session/settings.conf
    
	•	Config
  
	•	~/.gaming-mode.conf (user)
	•	/etc/gaming-mode.conf (system)
  
		Performance udev rules
    
	•	/etc/udev/rules.d/99-gaming-performance.rules
  
		Optional Intel Arc GTK4 fix
    
	•	e.g. /etc/environment.d/99-intel-arc-gtk4.conf
or ~/.config/environment.d/99-intel-arc-gtk4.conf
