streaming ontop redis effect

[mmienko]

Use stream commands from the main redis-effects module in the FS2 Stream wrapper module. Update read method to be DRY. Attempt to clarify some internal methods. Follow up to #969.

Could review be commit.

• Use core streams api and data structures in FS2Streaming module
• Refactor streaming read
• Rename file to match class
• Update test
• Update docs and demo
• Dry up the stream read api

This PR introduces breaking changes. Users will need to update imports, update read calls, and update XAddMessage to pass XAddArgs.
However, in the long term these should be beneficial.

We could consider an intermediate PR to introduce some of these changes in backwards compatible way and to mark old methods as depreciated.

If we decide to go forward, would be merge this into the 1.x.x series?

[arturaz]

One note: chunkSize and count seems redundant? It was the same previously, but now I noticed it. It seems that we read all or "count" elements from redis and then just chunk it from memory. That feels... pointless? Should we just remove chunkSize parameter?

[mmienko]

Should we just remove chunkSize parameter?

Good callout, it seems redundant as it is all in-memory at this point so they could be equal. Will remove.