feat(command): implement command execution for service monitoring

Add functionality to parse and execute commands for adding/removing service monitors and shutting down the watchdog. The ExecuteCommand function now handles "monitor.add", "monitor.remove" and "watchdog.shutdown" commands by interacting with the monitor package and system operations.

.gitignore

@@ -42,8 +42,8 @@ go.work.sum
 /frp_client
 /configs
 agent.md
-super-frpc
-super-frpc.exe
+Watchdog_Linux-systemd
+Watchdog_Linux-systemd.exe
 *.db
 database.db
 logs.html