Decouple Command used in User Request, Replication and Store

[acharapko]

• User requests should not be coupled with replication command used internally. I.e user may run some write command, we should not replicate the command, but replicate the data resulting from it.
• part of the translation between user commands and replication commands should be done in Table to KV Mapping #1
• at store level, we execute replication commands, not user commands.
• call replication command something different? ReplicationOperations? RepOp?