By Max Hunder and Tom Balmforth KYIV (Reuters) -Ukraine said on Monday it had invoked wartime laws to take control of stakes in a top engine-maker and four other strategic companies from some of the country’s richest men. It was the first time the government had used martial law for such a move since Russia invaded Ukraine in February and also its most dramatic wartime intervention into big business, touching companies linked to tycoons whose political power President Volodymyr Zelenskiy’s team has long sought to curb. The decision was taken at a meeting of top security officials chaired by Ze…