docs: def registerExitCall():
    r"""Registers an exit call to start the core.
  
      The core would be started after the main module is loaded. Ec would be exited from the core.
    """
    if state.isExitHooked:
      return
  
    state.isExitHooked = True
  
    from atexit import register
  
    register(core.start)