Offline coupling with Delwaq (#1137)

Fixes #649

This PR adds a folder `coupling/delwaq` for offline coupling with
Delwaq, with a more extensive description provided in `README.md` in the
same folder.

A test is provided in `test.py`, that is also run on Teamcity on
Windows, using the weekly DIMR releases. The `basic` testmodel (the only
with built-in substance concentration values) is used for this. In order
to speed-up the CI one can now do `pixi run ribasim-core-testmodels
basic` to only run the `basic` model (but any or multiple model names
can be used).

---------

Co-authored-by: Martijn Visser <mgvisser@gmail.com>
Co-authored-by: Jingru Feng <feng_jingru@foxmail.com>

coupling/delwaq/.gitignore

@@ -0,0 +1,5 @@
+model
+*.map
+*.nc
+*.pdf
+*.out

coupling/delwaq/README.md

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+# Ribasim Delwaq coupling
+This folder contains scripts to setup a Delwaq model from a Ribasim model, and to update the Ribasim model with the Delwaq output.
+
+## Steps
+Setup a Ribasim model with substances and concentrations and run it. For example, we can run the basic testmodel with some default concentrations using the Ribasim CLI:
+
+```bash
+ribasim generated_testmodels/basic/ribasim.toml
+```
+
+Afterwards we can use the Ribasim model and the generated output to setup a Delwaq model using Python from this folder.
+
+```python
+from pathlib import Path
+
+from generate import generate
+from parse import parse
+from util import run_delwaq
+
+toml_path = Path("generated_testmodels/basic/ribasim.toml")
+
+graph, substances = generate(toml_path)
+run_delwaq()
+model = parse(toml_path, graph, substances)
+```
+
+The resulting Ribasim model will have an updated `model.basin.concentration_external` table with the Delwaq output.
+We also store the same table in the `basin_concentration_external.arrow` file in the results folder, which can be
+referred to using the Ribasim config file.
+
+## Running Delwaq
+If you have access to a DIMR release, you can find the Delwaq executables in the `bin` folder. You can run a model directly with the `run_dimr.bat` script, and providing the path to the generated `.inp` file to it. In `util.py` we provide a `run_delwaq` (as used above) that does this for you, if you set the `D3D_HOME` environment variable to the path of the unzipped DIMR release, using the generated `model/ribasim.inp` configuration file.
+
+### Running Delwaq with Docker
+Alternative to running Delwaq with a DIMR release, you can also run the Delwaq model in a Docker container if you are a Deltares employee.
+First install WSL and install docker in WSL, then create a CLI secret and log into the Deltares containers. To install docker in WSL and create a CLI secret for the following steps, follow this guide https://publicwiki.deltares.nl/display/Delft3DContainers/.
+
+Log into Deltares containers in docker:
+```bash
+docker login containers.deltares.nl  # use your deltares email + token
+```
+
+You can now run the Delwaq model from this directory.
+```bash
+docker run --mount type=bind,source="$(pwd)/model",target=/mnt/myModel \
+  --workdir /mnt/myModel containers.deltares.nl/delft3d/delft3dfm run_dimr.sh
+```