* Support sharded pubsub

* Support sharded pubsub

* fix api

* fix enum

* fix api

---------

Co-authored-by: Marc Gravell <marc.gravell@gmail.com>

* Support sharded pubsub

* Support sharded pubsub

* fix api

* fix enum

* fix api

* proposed refactor to single-field implementation

* RedisDatabase needs to use SPUBLISH/PUBLISH correctly

* support ssub on CLIENT response

* add to features; fixup shipped etc

---------

Co-authored-by: xli <xli@roblox.com>