fix(lint): format using zig fmt

src/elements.zig

@@ -83,7 +83,6 @@ pub fn Tree(App: type) type {
             return .{ .x = width };
         }
 
-
         fn handle(ctx: *anyopaque, model: *App.Model, event: App.Event) !void {
             const this: *@This() = @ptrCast(@alignCast(ctx));
             switch (event) {