et-mode Changed approach for et-mode design. Removed PolKit rule for group-level systemd acesses. Switched to user-level systemd service pattern. Added initial systemd service for ARDOP

overlay/etc/skel/.config/systemd/user/et-service-ardop.service

@@ -0,0 +1,21 @@
+# Author  : Gaston Gonzalez
+# Date    : 6 November 2024
+# Purpose : User systemd unit file for EmComm Tools ARDOP service
+#
+# Usage: 
+#  Check status       : systemctl --user status et-service-ardop
+#  Start service      : systemctl --user start et-service-ardop
+#  Stop service       : systemctl --user stop et-service-ardop
+#  Reload this config : systemctl --user daemon-reload
+
+[Unit]
+Description=EmComm Tools ARDOP service
+# Disable conditional check for audio device. Allow et-ardop to enforce.
+#ConditionPathExists=/dev/et-audio
+
+[Service]
+ExecStart=/opt/emcomm-tools/bin/et-ardop
+Restart=no
+
+[Install]
+WantedBy=multi-user.target