With a name like Bright Side Farm, good times are sure to follow. For Annette and Matt Lauer, creating an equestrian facility in the Hamptons has been more than good: It has turned into a dream come true. The couple knew that transforming a former nursery into a 40-acre, world-class training ground for horses wasn’t for the faint of heart, but after two years and a lot of hard work, their newly completed Bright Side Farm has the gleam and polish of a thoroughbred champ…