[NEW] TTL of member

[hellower]

redis> SADD mybasket goods-id
redis> expire mybasket goods-id 10
redis>	1
redis>	expire mybasket goods-id1 goods-id2 goods-id3 10
redis>	3

redis>	sadd myset mem10
redis>	1
redis>	expire myset mem10 5
redis>	1
redis>	ttl myset mem10
redis>	3
redis>	ttl myset mem10
redis>	-2
redis>	smembers myset
redis>	(empty list or set)

This is a feature of redis-enterprise only. (supported data type: SET, ZSET, HASH)

[git-hulk]

This feature seems really useful in many scenes and supports it shouldn't be hard except having the breaking change. Maybe we can support it in V3, how do you think? @bitleak/kvrocks-core-team

BTW: @hellower welcome to join the slack channel if wants to exchange any thoughts about the kvrocks.

[ShooterIT]

OK. Let's add this feature request into 3.0 project todo.