Improve epoll use and implementation

[lokesh-wagh]

Description
Currently, the epoll system calls are being invoked on every iteration, which is not optimal. We need a way to efficiently manage the listening socket and active connections in epoll.

Tasks

Devise an efficient approach to handle connections using epoll

Ensure the listening socket is managed optimally

Avoid redundant epoll_ctl calls in the main loop

[RITIK-CHAUDHRY]

@lokesh-wagh is this open ?