🚀[FEA]: Allow passing models as to EDMPrecond

[simonbyrne]

Is this a new feature, an improvement, or a change to existing functionality?

Improvement

How would you describe the priority of this feature request

Medium

Please provide a clear description of problem you would like to solve.

Currently models are passed as names (strings) and splatted arguments. This makes it confusing to determine which arguments get passed to the model and which go to the preconditioner. It would be nice to also allow just passing an initialized model itself. The downside is that the user would be required to determine the correct input and output channels, but I don't think this is too onerous (and it could also be checked when the preconditioner is initialized.

Describe any alternatives you have considered

No response