Looking for something to do with your extra day off this weekend? When not attending a Fourth of July parade or cookout, you might want to stroll through a few of the new art offerings in the Berkshires and environs this weekend. Here are 3 new shows and festivals, most of which open Friday, July 1, to check out.  1. BERKSHIRES ARTS FESTIVAL  “Harbour” by Danny O, one of several Berkshire artists at Berkshires Arts Festival July 1-3 at Ski Butternut. PHOTO PROVIDED BY DANIEL O’CONNOR Where: Ski Butternut, Route 23, 380 State Road, Great Barrington When: 10 a.m. to 6 p.m., July 1 and 2; 10 a.m. to 5…