Add Ping feature

[mateenbagheri]

This is the first task that needs to be done. Here is why this task is very important. This task is where the initial architecture for networking and project structure is build upon from. In order for this task to be done clearly, we need to do the following:

• [x] - Read on how other similar projects like this (e.g: Redis) interfaces are designed. At this stage, we are more focusing on the core and implementing a CLI is not a concern for us at the moment.
• [x] - Implement the networking patterns and protocols for interacting with the core
• [x] - Implement the PING feature. Ping is supposed to return PONG in case connection is established successfully.
• [x] - Document the final process of interacting with core
• [x] - Write tests and benchmarks for this task

[mateenbagheri]

here is the solution PR for all I have done so far. The decision for this task to implement simple ping request, changed to it being more of an echo command. server must take a message and simply echo it back to the client.