The biggest retailer in the world, headquartered in Bentonville, Arkansas, is one step closer to moving into a new home office for more than 14,000 people, which will be outfitted with fitness centers for employees and their families, a child-care facility, more diverse dining options like food trucks, trails for hiking and biking, and tons of windows — yes, more windows. Walmart’s current home office is notorious for lacking natural light….