A splashy museum in New York pays tribute to the city's long relationship with theatre from West Side Story to Hamilton It is a patchwork of colour and craft, its 8in squares celebrating productions from the 1980s " Annie, Cats, Chess, Carousel, Les Misérables, Macbeth, Me and My Girl, Oh! Calcutta!, Starlight Express. One square, for the musical The Rink, is signed by stars Liza Minnelli and Chita Rivera. But the A…