Add support for COMMAND COUNT command

[arpitbbhayani]

Add support for the COMMAND COUNT command in DiceDB similar to the COMMAND COUNT command in Redis. Please refer to the following commit in Redis to understand the implementation specifics - source.

Write unit and integration tests for the command referring to the tests written in the Redis codebase 7.2.5. For integration tests, you can refer to the tests folder. Note: they have used TCL for the test suite, and we need to port that to our way of writing integration tests using the relevant helper methods. Please refer to our tests directory.

For the command, benchmark the code and measure the time taken and memory allocs using benchmem and try to keep them to the bare minimum.

[dhruvdabhi101]

I would like to work on it. Can you please assign this issue to me ?

[JyotinderSingh]

I would like to work on it. Can you please assign this issue to me ?

Looks like #153 is already under review for this. Please take a look at other open issues that are not yet being worked on.

[AshwinKul28]

@JyotinderSingh If already merged, good to close this issue?