as_frank_wolfe(f, grad!, lmo, x0; ...)

Simplest form of the Frank-Wolfe algorithm. Returns a tuple (x, v, primal, dual_gap, traj_data) with:

• x final iterate
• v last vertex from the LMO
• primal primal value f(x)
• dual_gap final Frank-Wolfe gap
• traj_data vector of trajectory information.