feat: include clean-up and update-check services

usr/lib/lib/systemd/system/akshara-update-cleanup.service

@@ -0,0 +1,12 @@
+[Unit]
+Description=Clean-up following system update
+StartLimitIntervalSec=0
+
+[Service]
+Type=simple
+Restart=no
+User=root
+ExecStart=/usr/bin/find / -maxdepth 1 -type d -name '.old.*' -exec /usr/bin/rm -rf -- {} +
+
+[Install]
+WantedBy=multi-user.target

usr/lib/lib/systemd/user/akshara-update-check.service

@@ -0,0 +1,8 @@
+[Unit]
+Description=System updates
+
+[Service]
+ExecStart=/usr/bin/system update-check
+
+[Install]
+WantedBy=default.target