Migration, refactoring of Single Shard and Multishard commands

[AshwinKul28]

This PR migrates multiple DiceDB commands to support both multi-shard and single-shard scenarios. The migration follows a structured flow for each command type as described below.

Multi-Shard Commands The following commands are migrated with support for multi-shard processing:

1. MSET
2. MGET
3. SINTER
4. SDIFF
5. JSON.MGET

For the COPY and RENAME commands, the flow includes preprocessing, followed by decomposition and composition steps to manage multi-shard data efficiently. For the remaining multi-shard commands, only decomposition and composition steps are involved.

Single-Shard Commands The following commands are migrated with support for single-shard processing:

1. JSON.SET
2. JSON.GET
3. JSON.TOGGLE
4. JSON.TYPE
5. JSON.DEL
6. JSON.FORGET
7. JSON.NUMMULTBY
8. JSON.INGEST
9. JSON.HGETALL
10. JSON.NUMINCRBY

These single-shard commands follow a scatter-gather approach with a straightforward flow, where each command operates directly within the target shard, without the need for complex decomposition.

[AshwinKul28]

@soumya-codes PR is now ready for the review, I will add more comments and documentation before merging.

[AshwinKul28]

Closing this as opening another