Qatar mediating between the Taliban and the ISIS-K

Qatar is on it continues dialogue with the Taliban in Afghanistan, encouraging them to act as “members of Afghan society”, fixing the relationship of between ISIS-K and the Taliban

Who are the ISIS-K militiamen? It is a terrorist group affiliated with the self-proclaimed Islamic State in Afghanistan who are in competition with the Taliban.

ISIS-K violence could force the west into an unlikely alliance with Taliban and this would weaken the force of terrorism network. Get drift why Qatar is acting mediator between the Taliban and ISIS-K now?