By Nia Williams (Reuters) – Danielle Smith was sworn in as premier of Canada’s main oil-producing province Alberta on Tuesday, days after winning the United Conservative Party leadership race with promises to stand up to the federal government in Ottawa. Smith became Alberta’s third female premier, and nineteenth overall, at a ceremony in the provincial capital Edmonton. “Together we will stand up to defend Albertans’ charter rights, as well as defend Alberta’s exclusive rights over our areas of provincial jurisdiction,” Smith said in her speech. Alberta, home to Canada’s vast oil sands and th…