Attorney General Martha Coakley would follow Gov. Deval Patrick’s example of intervening in a family business dispute — like the Market Basket feud — if elected governor, she told the Herald yesterday.“If the governor is able to play a role in something that seems to me to be a preventable dissolution of what’s been a long family-owned business here in Massachusetts, then he should, and I would as governor,” said Coakley, noting the economic impact the long squabble has had on both the state and thousands of workers.