NEW YORK — One day after catcher Tomas Nido left a game with a hand contusion, the Mets added another catcher to the roster. The team announced a trade on Saturday, acquiring catcher Michael Perez from the Pittsburgh Pirates in exchange for cash. This is the second day in a row that the Mets have swung a trade with the Pirates. They swapped reliever Colin Holderman for slugger Daniel Vogelbach on Friday. Perez, 29, is a native of Puerto Rico who’s been in the big leagues since 2018. Mostly serving as a part-time player, he has a .175 average in 193 games. Last season for Pittsburgh, his 70 gam…