Implement ZSCAN command

[kelvinmwinuka]

Scans the entries of a sorted set.
Reference: https://redis.io/docs/latest/commands/zscan/

Client-Server Spec:

Command File: ./internal/modules/sorted_set/commands.go
Test File: ./internal/modules/sorted_set/commands_test.go

Command: zscan
Module: constants.SortedSetModule
Categories: contants.SortedSetCategory, constants.ReadCategory, constants.SlowCategory
Description: (ZSCAN key cursor [MATCH pattern] [COUNT count]) scan the entries of a sorted set
Sync: false

Embedded Spec:

Command File: ./echovault/api_sorted_set.go
Test File: ./echovault/api_sorted_set_test.go

Documentation

Add documentation to ./docs/docs/commands/sorted_set/zscan.mdx