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

main.go

@@ -8,6 +8,7 @@ import (
 	"os/signal"
 	"super-frpc/frpLogger"
 	"super-frpc/postLog"
+	"super-frpc/watchdog"
 	"syscall"
 	"time"
 )
@@ -90,6 +91,17 @@ func main() {
 
 	setupRoutes()
 
+	err = watchdog.Init()
+	if err != nil {
+		postLog.Error(fmt.Sprintf("Unable to initialize Watchdog: %s", err))
+	} else {
+		if !watchdog.Connect("127.0.0.1", config.Watchdog.Port) {
+			postLog.Error(fmt.Sprintf("Failed to connect to Watchdog at %s:%d", "127.0.0.1", config.Watchdog.Port))
+		}
+	}
+
+
+
 	addr := fmt.Sprintf("%s:%s", config.ListenAddr, config.ListenPort)
 	server := &http.Server{
 		Addr:         addr,