feat(watchdog): add watchdog service with TCP client implementation

- Implement TCP client for watchdog service communication
- Add watchdog configuration in config.json
- Update main.go to initialize and connect to watchdog
- Add watchdog related functions (connect, command handling)
- Update README.md with new watchdog feature
- Improve route setup logging in router.go

router.go

@@ -8,7 +8,6 @@ import (
 )
 
 func setupRoutes() {
-	postLog.Info("Setting up routes...")
 	http.HandleFunc("/system/getStatus", GetStatusHandler)
 	http.HandleFunc("/system/getSoftwareInfo", GetSoftwareInfoHandler)
 	systemLogHandler := postLog.NewLogSocketHandler(postLog.GetLogBroadcaster())
@@ -44,6 +43,8 @@ func setupRoutes() {
 
 	http.HandleFunc("/", NotFoundHandler)
 
+	postLog.Info("Routes setup successfully")
+
 }
 
 func NotFoundHandler(w http.ResponseWriter, r *http.Request) {