Gardnerville resident Chad Holdren is on the brink of seeing his lifelong dream come true.Holdren, 30, won the first round in the Texaco Country Showdown in Reno on May 27."I couldn't even breathe. Every single contest I've done, if I haven't won, I've lost to a girl and I was competing against a girl," he said. "I couldn't be more proud. I got to win in front of my dad. The feeling was ecstatic."The Showdown is a nationwide country music talent search with a grand prize of $100,000 and a recording contract.Over the years, Garth Brooks, Sara Evans and Brad …