Add `redis_buffer` configuration. (#152)
Add `redis_buffer` configuration. (#152)

Some redis protocol compatible storage (e.g., kvrocks) do not support `MULTI` and `EXEC` command,
but they may support pipeline execution. So here provide `transaction` option to the caller to
choose if enable transaction.

Co-authored-by: tianhuan <e407cdb6cf657d533ddae0e54dfe259ec55b9243@bingotree.cn>
ekzhu/datasketch,ekzhu/datasketch