refactor(cluster): export ClusterAdapterOptions and MessageType types

Related:

- https://github.com/socketio/socket.io-redis-streams-adapter/blob/89d00a49e4aadf1bfe32ddc644d0ef877a08238d/lib/adapter.ts#L17
- https://github.com/socketio/socket.io-redis-streams-adapter/blob/89d00a49e4aadf1bfe32ddc644d0ef877a08238d/lib/adapter.ts#L191