add: some user api and all api desc

common/converter/README.md

@@ -40,7 +40,7 @@ func StructToStruct(src, dst interface{}) error
 ```go
 import "app/common/converter"
 
-// 单个 model 转 pb
+// 单个 models 转 pb
 user, _ := m.FindOne(ctx, userId)
 pbUser := &pb.Users{}
 converter.StructToStruct(user, pbUser)
@@ -63,7 +63,7 @@ func SliceToSlice(src interface{}, dstSliceType interface{}) (interface{}, error
 **示例：**
 
 ```go
-// 多个 model 转 pb
+// 多个 models 转 pb
 users := []*models.Users{user1, user2, user3}
 pbUsersIface, _ := converter.SliceToSlice(users, []*pb.Users{})
 pbUsers := pbUsersIface.([]*pb.Users)