add pid and start flag for gui, add systemd service file and .desktop file with new setup.sh

data/controldeck.desktop

@@ -0,0 +1,7 @@
+[Desktop Entry]
+Name=ControlDeck
+Exec=${HOME}/.local/bin/controldeck-gui
+Terminal=false
+Type=Application
+StartupNotify=true
+StartupWMClass=controldeck

data/controldeck.service

@@ -0,0 +1,12 @@
+[Unit]
+Description=ControlDeck
+
+[Service]
+Environment=PYTHONUNBUFFERED=1
+ExecStart=%h/.local/bin/controldeck
+Restart=always
+RestartSec=10
+StandardOutput=journal
+
+[Install]
+WantedBy=default.target