Inconsistent ZRANGE

[vanshavenger]

          ## Setup Command

ZADD leaderboard 50 "Alice" 70 "Bob" 60 "Charlie" 80 "Dave"

Commands and Observations

1. ZRANGE leaderboard 0 0

Redis: Returns the lowest score entry ("Alice")
DiceDB: Matches Redis behavior.

2. ZRANGE leaderboard -1 -1

Redis: Returns the highest score entry ("Dave")
DiceDB: Matches Redis behavior.

3. ZRANGE leaderboard 0 01

Redis: (error) ERR value is not an integer or out of range
DiceDB: Command succeeds unexpectedly.

4. ZRANGE leaderboard -1 0

Redis: Returns an empty array.
DiceDB: Produces no output.

5. ZRANGE leaderboard 1 0

Redis: Returns an empty array.
DiceDB: Produces no output.

6. ZRANGE leaderboard (60 80 BYSCORE

Redis: Executes correctly, returning entries with scores between 60 and 80, exclusive of 60.
DiceDB: Error: ERR syntax error

7. ZRANGE leaderboard (60 (80 BYSCORE

Redis: Executes correctly, returning entries with scores strictly between 60 and 80.
DiceDB: Error: ERR syntax error

8. ZRANGE leaderboard [a [z BYLEX

Redis: Executes correctly, returning entries between lexical ranges.
DiceDB: Error: ERR syntax error

9. ZRANGE leaderboard 0 3 WITHSCORES REV

Redis: Returns entries in descending score order with scores.
DiceDB: Matches Redis behavior.

10. ZRANGE random 0 2 (key that is not in the cache)

Redis: Returns (empty array)
DiceDB: Produces no output.

11. ZRANGE leaderboard (1 +inf BYSCORE LIMIT 0 2

Redis: Returns up to 2 entries with scores greater than 1.
DiceDB: Error: ERR syntax error

I believe Error: ERR syntax error means not implemented. I'm open to implementing the missing parts (new to Golang will take me a lot of time tho).

Originally posted by @jonathanalvares9009 in #1284 (comment)

[vanshavenger]

@apoorvyadav1111 @lucifercr07
Kindly asign me this.

I have a PR ready for the BYScores, BYLEx, and soe other missing things in ZRNAGE and all the above things are working correctly.

[vanshavenger]

Also please let me know if i should go ahead and add or update ZRANGE docs too.

[lucifercr07]

@vanshavenger assigned, thanks for contributing. Please update the docs if required.

[vanshavenger]

#1396