feat: add Arch update helper and web UI

systemd/lazy-update-manager.desktop

@@ -0,0 +1,8 @@
+[Desktop Entry]
+Type=Application
+Name=LazyUpdateManager
+Comment=Arch and Hyprland update helper
+Exec=lazy-update-manager gui
+Icon=system-software-update
+Terminal=false
+Categories=System;Utility;

systemd/lazy-update-manager.service

@@ -0,0 +1,6 @@
+[Unit]
+Description=LazyUpdateManager update reminder
+
+[Service]
+Type=oneshot
+ExecStart=%h/.local/bin/lazy-update-manager notify

systemd/lazy-update-manager.timer

@@ -0,0 +1,11 @@
+[Unit]
+Description=Check for Arch updates and remind weekly
+
+[Timer]
+OnBootSec=10min
+OnUnitActiveSec=2h
+AccuracySec=15min
+Persistent=true
+
+[Install]
+WantedBy=timers.target