As the city made final preparations for the St. Patrick’s Day Parade, more than a hundred people gathered in a church basement to raise more than $100,000 for a local food panty.“There’s so much going on on St. Patrick’s Day, we thought it would be nice to do something different,” said James Brett, a former state representative and one of the organizers of the Dorchester St. Patrick’s Day Brunch, now in its 12th year.