Setting downstream boundary condition for local-inertial

[shartgring]

Kind of request

Adding new functionality

Enhancement Description

The downstream water depth boundary condition is now provided through staticmaps instead of using the toml, see also Deltares/Wflow.jl@5678514 as a part of Deltares/Wflow.jl#402

Would it be an idea to provide the option to set the boundary condition through hydromt_wflow? Perhaps through setup_rivers?

Use case

When a user wants to set custom bc deviating from the default settings (depth = 0 meters, length = 10 km)

Additional Context

I am wondering what the influence of the downstream boundary condition typically is for a Wflow model. This is something I am looking into with Joost for GRADE Vecht :)