Improve storing and downloading of example models

[JoostBuitink]

Feature type

Changing existing functionality

Improvement Description

Currenlty, the example models (used for testing and linked in the docs to run example simulations) are stored at this repo: https://github.com/visr/wflow-artifacts. Different releases on this repo contain different versions of the input data. It would be good to improve this, to e.g. link all required input files to the wflow release versions, and perhaps move this to a Deltares repo?

Implementation Description

No response

Additional Context

No response