feat: client subscriber gets an AsyncIterable

Describe the feature you'd like to request

On the vanilla client, being able to an AsyncIterable<T> from a subscription in order to make it compliant with the streamedQuery from tansatck query.

Currently @trpc/tanstack-react-query support for useSubscriptions but implementing the AsyncIterable on the vanilla client would provide the feature to vue user as well.

Describe the solution you'd like to see

Implement the client.myProcedure.subscribe().iterator(): Promise<AsyncIterable<T>>

Describe alternate solutions

• https://reactivex.io/IxJS/functions/asynciterable.fromEventPattern.html

Additional information

No response

‍‍ Contributing

• ‍♂️ Yes, I'd be down to file a PR implementing this feature!