Renamed exports
In the past, the `@apollo/experimental-nextjs-app-support` package had two entry points, `/rsc` and `/ssr`.
This has caused a lot of confusion, and both entry points have been moved together into the base entry point, `@apollo/experimental-nextjs-app-support`.
On top of that, the Apollo Client React hooks (`useQuery`, `useSuspenseQuery`, etc.) no longer need to be imported from `@apollo/experimental-nextjs-app-support`, but they can be imported directly from `@apollo/client` now, while still being streaming-compatible.
Also, a few exports have been renamed:
- `NextSSRApolloClient` -> `ApolloClient`
- `NextSSRInMemoryCache` -> `InMemoryCache`
- `resetNextSSRApolloSingletons` -> `resetApolloClientSingletons`
The old entry points with the old exports still exist and each of them has a `@.deprecated` docblock explaining the new import to use.