It started as another ordinary moment outside with a child playing, a mother nearby, nothing out of place. Then gunfire shattered it. A stray bullet cut through the chaos and struck Sequoya Bacon-Jones, turning a dispute that began online into a tragedy that unfolded in real time. Now, the man responsible is facing the consequences. Isiah Roberts, 23, (left) pleaded guilty to aggravated manslaughter after fatally shooting 9-year-old Sequoya Baco…