Using a Julia linear system solver?

[baggepinnen]

Hello and thanks for this awesome package! This is more of a question than an issue, I'd be interested in the feasibility of using a linear system solver implemented in Julia with OSQP. Has anyone explored or thought about his? The docs indicate that implementing new solvers should be doable by writing a C wrapper? I notice that the docs talk about

subfolder direct/ or indirect/ depending on the type of solver.

but the subfolder indeirect does not appear to exist. I'd be primarily interested in adding an iterative solver to experiment with fast re-factorization (warmstarting of the factorization step) for nonlinear MPC (if you have any insights into this particular idea, those would be very welcome as well :).