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

config.go

@@ -17,6 +17,9 @@ type Config struct {
 	FrpcPath     string `json:"frpcPath"`
 	InstancePath string `json:"instancePath"`
 	Debug        bool   `json:"debug"`
+	Watchdog     struct {
+		Port int `json:"port"`
+	} `json:"watchdog"`
 }
 
 type InstanceInfo struct {
@@ -75,13 +78,21 @@ func LoadConfig(configPath string) (*Config, error) {
 	}
 
 	if config.FrpcPath == "" {
-		config.FrpcPath = "/usr/bin/frpc"
+		if GetInitSystem() == "windows" {
+			config.FrpcPath = "frp_client/frpc.exe"
+		} else {
+			config.FrpcPath = "/usr/bin/frpc"
+		}
 	}
 
 	if config.InstancePath == "" {
 		config.InstancePath = "./configs"
 	}
 
+	if config.Watchdog.Port == 0 {
+		config.Watchdog.Port = 12380
+	}
+
 	if err := os.MkdirAll(config.InstancePath, 0755); err != nil {
 		return nil, fmt.Errorf("failed to create config directory: %w", err)
 	}