Implement OBJECT commands (ENCODING, FREQ, IDLETIME, REFCOUNT)

[prateek-kumar-improving]

Description

Implement the OBJECT subcommands for PHP. Already available in Java, Python, Node, Go, and C#.

Commands

• OBJECT ENCODING — Returns the internal encoding of the object at key
• OBJECT FREQ — Returns the access frequency of the key (LFU policy)
• OBJECT IDLETIME — Returns the idle time of the key in seconds
• OBJECT REFCOUNT — Returns the reference count of the object at key

Reference

• https://valkey.io/commands/object-encoding/
• https://valkey.io/commands/object-freq/
• https://valkey.io/commands/object-idletime/
• https://valkey.io/commands/object-refcount/
• [EPIC] Valkey Commands Tracker valkey-glide#6292 — Commands Tracker