Question: Resolver Execution Order

Hey team, is there a way to execute the parent resolver in parallel with the children resolver?

### What happened?
**Resolver**
```
ParentA:
fields:
ChildA:
resolver: true
ChildB:
resolver: true
```

Currently the execution order is:
- ParentA
- ChildA
- ChildB

I would like the execution order to be:
- ParentA
- ChildA
- ChildB

Is this possible?
### What did you expect?

### Minimal graphql.schema and models to reproduce

### versions
- `go run github.com/99designs/gqlgen version`?
- `go version`?

查看 gqlgen 代码库中的 resolver 执行逻辑，可能位于 execution 或 resolver 包中。了解当前父 resolver 和子 resolver 的执行顺序。检查是否已有并发或并行执行模式。目标是修改执行顺序，使父 resolver 和子 resolver 能够并行运行，这需要深入理解 GraphQL 执行过程和 gqlgen 的内部实现。

由索引模型根据 Issue 内容生成。