Amazon will fulfill Walmart orders for independent sellers through its logistics network. (GeekWire Photo / Todd Bishop) In an e-commerce twist almost worthy of The Twilight Zone or Black Mirror, Amazon is now officially supporting orders placed on Walmart.com — allowing sellers to tap into Amazon’s logistics network to fulfill purchases made on the site of its biggest retail rival. The move, announced Thursday at Amazon’s Accelerate seller conference, is part of a broader expansion of its Multi...