Sharing input and output type schemas

Is there a pattern or templating support to allow input and output types to share a consistent schema in the schema definition? I know that GraphQL doesn't natively support this but in some languages (TypeScript) people have worked around it using templating techniques.

Specifically when I want to ensure a consistent schema across an input and output types such as:

```
type WidgetConfig {
enableWidget1: Boolean!
enableWidget2: Boolean!
}

input WidgetConfigInput {
enableWidget1: Boolean!
enableWidget2: Boolean!
}

mutation {
configureWidget(config: WidgetConfigInput!): WidgetConfig
}
```

查看 gqlgen 代码库中与 schema 生成和类型映射相关的部分，尤其关注输入类型和输出类型的处理。检查在 Go 中扩展 GraphQL schema 定义的现有模式。目标是提出一种在输入类型和输出类型之间共享 schema 的设计，可能通过模板化或代码生成技术实现。

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