(Image credit: MediaNews Group/Boston Herald via Getty Images / Contributor) Youth sports used to be a relatively simple line item in the family budget. Parents might pay a registration fee, buy a pair of cleats and celebrate the end of the season with pizza. That’s no longer the case. Today, youth sports have evolved into a sprawling, multibillion-dollar industry fueled by travel leagues, private coaching, tournament circuits and a growing ecosystem of apps and specialized services. According to recent data from Project Play , family spending on a child’s primary sport has surged by roughly 46% in the past five years, reflecting a broader shift toward year-round, highly structured competition. From just $107.88 $24.99 for Kiplinger Personal Finance Become a smarter, better informed investor.…