The Belgium international has put pen to paper on a five-year contract after the two clubs agreed a fee, believed to be in the region of ã50million, for the 22-year-old.Onana failed to make much of an impact at Goodison Park in a struggling team since his ã35m arrival from Lille two years ago but, after featuring for his country at Euro 2024, Villa boss Unai Emery believes he will strengthen his squad as they prepare to play in the Champions League for the first time.Douglas Luiz left for Juventus last month, freeing up money and space for Onana while keeping Villa within Premier…