Expose / Provide Event to mutate cached data

It would be great if the `cache` method could return an event with wich it would be possible to set cache data directly. This should work the same way how `tanStackQuery.setQueryData` works.

For Example:

```ts
const customerQuery = createQuery(...)
const { setCacheData } = cache(customerQuery, ...)

customerQuery.$data // { firstname: 'John', lastname: 'Doe' }

setCacheData({ firstname: 'John', lastname: 'Malkovich' })
customerQuery.$data // { firstname: 'John', lastname: 'Malkovich' } <-- $data reflects updated cache
```