Add the directives that are called to the comment above the respective resolver function

It would be helpful to see in the resolver files for which functions a directive is called.
I did not find the option of using templates or similar for the comment generation.

e.g.:
```graphql

...
type Query {
status: String! @adminRequired
}

directive @adminRequired on FIELD_DEFINITION
...
```

results in:

```golang
...
// Status is the resolver for the status field.
// @adminRequired
func (r *queryResolver) Status(ctx context.Context) (string, error) {
return "OK - GraphQL Running", nil
}
...
```

查看 gqlgen 中的代码生成逻辑，可能是在 resolver 生成阶段。这个 issue 涉及将 directive 名称添加到生成的 resolver 函数上方的注释中。首先找到创建 resolver 注释的位置，然后修改实现，以包含来自 GraphQL schema 的 directive 信息。检查现有的 resolver 生成测试以了解输出格式，并为这一新功能添加测试。

由索引模型根据 Issue 内容生成。