Add integration tests for commands execution related to hyperloglog (3)

[lucifercr07]

This issue involves creating the test cases for playground-mono repo:

Source: internal/tests/integration/commands/

• pfadd_test.go
• pfcount_test.go
• pfmerge_test.go

Steps:

1. Create the corresponding tests for these commands in internal/tests/integration/commands/
2. We can use this file from dice repo for reference.
3. Run the tests and fix issues with command parsing in server.

If you need to do anything custom feel free to comment on this issue for more details.

NOTE: Please consider that for the integration tests we should ideally have a dice server spin up via Docker container in Go and then write integration tests. We can use Go Libraries like testcontainers-go for this.

[tarun-kavipurapu]

@lucifercr07 can you assign this to me

[lucifercr07]

@tarun-kavipurapu assigned, thanks for contributing.

[lucifercr07]

@tarun-kavipurapu initial structure for integration tests are in, please let us know if any other details are required.

[lucifercr07]

Closing merged as part of #38