[Feature] (TypeScript) The `OptionDataItemObject` type has not be exported

### What problem does this feature solve?

Some typescript supporting for the `OptionDataItemObject` and its child interfaces.

Now I have to define the `OptionDataItem` in my own project:
```
// TODO The same as ECharts' declaration
type OptionDataItemObject = {
id?: OptionId;
name?: OptionName;
groupId?: OptionId;
childGroupId?: OptionId;
value?: T[] | T;
selected?: boolean;
};

const load = (data: OptionDataItemObject) => {
//...
}
```

### What does the proposed API look like?

I don't need to describe the ECharts' types