添加helloWorld

@@ -3,6 +3,7 @@ package socialwork_sdk
 import (
 	"encoding/base64"
 	"encoding/json"
+	"fmt"
 	"gitlab.workai.com.cn/chenang/socialwork-sdk/model"
 	"log"
 )
@@ -16,6 +17,10 @@ type OrderClient struct {
 	IP                 string `json:"ip"`
 }
 
+func HelloWorld() {
+	fmt.Println("欢迎使用小爱，socialwork-sdk")
+}
+
 func NewOrderClient(key, iv, customerPrivateKey, publicKey, ip string) *OrderClient {
 	return &OrderClient{
 		Key:                key,