Feature: Add Hash Field Expiration Commands

[ofekshenawa]

Description

Introduce new commands that enable setting expiration times for individual fields within a hash. These commands will mirror existing Redis commands for setting key expiration but will be adapted for hash fields.

Proposed Commands

1. HEXPIRE: Set TTL in seconds for specified fields within a hash.
2. HPEXPIRE: Set TTL in milliseconds for specified fields within a hash.
3. HEXPIREAT: Set expiration time as a UNIX timestamp in seconds for specified fields.
4. HPEXPIREAT: Set expiration time as a UNIX timestamp in milliseconds for specified fields.
5. HPERSIST: Remove expiration time from specified fields.
6. HEXPIRETIME: Retrieve the expiration time in seconds for specified fields.
7. HPEXPIRETIME: Retrieve the expiration time in milliseconds for specified fields.
8. HTTL: Retrieve the TTL in seconds for specified fields.
9. HPTTL: Retrieve the TTL in milliseconds for specified fields.

Request for Comments

Feedback on the implementations is highly welcome. Please share any concerns or additional features that should be considered.