Meta Platforms Inc. has agreed to acquire Singapore-based AI startup Manus, which makes an artificial intelligence agent that it sells to small and medium-sized businesses.The deal is part of a broader push by Meta to build a business around its massive AI investment, which has captured the focus of Chief Executive Officer Mark Zuckerberg and become the company’s top priority. Manus, which had an annual revenue run rate of $125 million earlier this year, sells its agent via a subscription servic...