Every day it seems like there’s a new wardrobe staple the internet is insisting you should have in your closet.There’s the classic pair of jeans, a good button-down, a blazer — the list goes on.But fashion stylist and wardrobe consultant Kenzie Welch told Business Insider the No. 1 item she always tells her clients to invest in is a great quality T-shirt. A long-lasting T-shirt is a…