use 'gf gen ctrl' to support“type()” #3063
Description
gf gen ctrl 是否可以支持一下，下面这种语法
同一个api的req和res用type括起来是不是更清晰一点？
type (
CreateReq struct {
g.Meta `path:"/administrator/v1/create" method:"post" tags:"AdministratorService" summary:"Create a new administrator"`
}
CreateRes struct{}
)