Refactor SteamOS session management and launcher scripts

- Removed obsolete launch_desktop.sh and launch_session.sh scripts.
- Introduced new steam-launcher script to handle Steam launching and session tracking.
- Added steam-short-session-tracker for monitoring short Steam sessions and triggering repairs.
- Created steamos and steamos-session scripts for managing the SteamOS session.
- Implemented steamos-session-select for switching between Gamescope and Plasma sessions.
- Updated SDDM configuration for autologin and session management.
- Added new systemd services and targets for managing Gamescope and Steam sessions.
- Created desktop entries and icons for ALVR and SteamOS shortcuts.
- Enhanced logging and error handling across scripts.
- Cleaned up unused systemd slice and service files.
- Updated Ansible playbook to reflect new configurations and file structures.

ansible/files/game_station/bin/system/steamos-session-select

@@ -4,6 +4,11 @@ LOGFILE="$HOME/.local/logs/session.log"
 
 log() { echo "[$(date --iso-8601=seconds)] $*" | tee -a "$LOGFILE"; }
 
+die() { echo >&2 "!! $*"; exit 1; }
+
+# File this script will modify
+CONF_FILE="/etc/sddm.conf.d/zz-steamos-autologin.conf"
+
 session="${1:-gamescope}"
 
 case "$session" in
@@ -23,18 +28,12 @@ case "$session" in
   ;;
 esac
 
-if systemctl --user is-active --quiet sunshine.scope; then
-  log "Stopping sunshine.scope"
-  systemctl --user stop sunshine.scope
-fi
-if systemctl --user is-active --quiet steam.scope; then
-  log "Stopping steam.scope"
-  systemctl --user stop steam.scope
-fi
-if systemctl --user is-active --quiet plasma.scope; then
-  log "Stopping plasma.scope"
-  systemctl --user stop plasma.scope
-fi
-sleep 5
-log "Restarting graphical session service..."
-systemctl --user restart session.service
+log "Signaling session switch..."
+touch "$HOME/.steamos-session-switch"
+
+# It is possible to get things remaining from the previous session if SDDM is sigkilled by root systemd
+# and our units are still running in the user systemd
+systemctl --user stop gamescope-session.target
+systemctl --user stop plasma-workspace.target
+systemctl --user reset-failed
+