Anne Imhof, the German visual artist known for her provocative performances, paintings and installations — including a 2021 exhibition of mirrors at the Palais de Tokyo in Paris, “Natures Mortes,” meant to be a reflection on mortality, and a 2017 Venice Biennale durational performance “Faust” — is launching a fashion project in partnership with Reference Studios, the Berlin-based communications agency founded by Mumi Haiati. The…