Reexport ADTypes

[asinghvi17]

Is your feature request related to a problem? Please describe.

I’m always frustrated when I have to load ADTypes to specify the AD engine.

Describe the solution you’d like

MTK should @reexport using ADTypes or at least reexport the types.

Describe alternatives you’ve considered

Not really, no

[ChrisRackauckas]

OrdinaryDiffEqCore instead?

[asinghvi17]

Those types are not in using OrdinaryDiffEqCore

Or do you mean reexporting ADTypes from ODECore instead? Yeah as long as that's reexported here too, that works

[ChrisRackauckas]

Yes, since the types aren't used by MTK it's a bit odd to reexport them from here. It's the implicit solvers. OrdinaryDiffEq, OrdinaryDiffEqRosenbrock, etc.

Though... it should actually be a lower level detail that most users don't worry about...