feat: Add version check in admin login (#658)

* feat: admin login add version pb

* feat: admin login add version

Author: icey-yu

internal/api/admin/admin.go

@@ -52,6 +52,10 @@ func (o *Api) AdminLogin(c *gin.Context) {
 		apiresp.GinError(c, err)
 		return
 	}
+	if req.Version == "" {
+		apiresp.GinError(c, errs.New("openim-admin-front version too old, please use new version").Wrap())
+		return
+	}
 	loginResp, err := o.adminClient.Login(c, req)
 	if err != nil {
 		apiresp.GinError(c, err)