Add results component

[hboisgon]

Issue addressed

Fixes #528

Explanation

Results used to be one object (dict of xarray objects). WIth the flexible component structure, I decided to split results into one component per file:

• output_grid for the netcdf gridded output. It then inherits from the GridComponent with staticmaps as its region.
• output_scalar for the netcdf scalar output. I realise we do not have a simple xarrayDataset components, only the dict of Datasets in core so I started from the base ModelComponent.
• output_csv for the csv output. This one is then the DatasetsComponent of core and objects within are hydromt.vector.GeoDataArray. To be able to add georeference, the staticmaps need to be passed so I added a locations_component attribute. It's not really the region as csv can contain outputs for 3 points withint the basin so I thought defining another name was better.

Checklist

• Updated tests or added new tests
• Branch is up to date with feat/migration-hydromt-core-v1
• Tests & pre-commit hooks pass
• Updated documentation if needed

Additional Notes (optional)

In the current v0 version, csv output are converted to several netcdf files and geo-references are also added in the process. For netcdf_scalar, we only read the file directly but in a way it could also be split to several GeoDataArrays in the same way as the csv output. Maybe still something we would like to do?

[Copilot]

Pull Request Overview

This PR refactors the Wflow model's output handling by splitting the previous single results component into three dedicated output components, aligning with the new flexible component structure from HydroMT core v1.

• Split results component into three separate output components for different file types
• Added output_grid, output_scalar, and output_csv components with corresponding read/write functionality
• Updated tests, documentation, and examples to reflect the new component structure

Reviewed Changes

Copilot reviewed 20 out of 20 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
hydromt_wflow/wflow.py	Removed old results handling and added three new output components
hydromt_wflow/components/init.py	Added imports for new output components
hydromt_wflow/components/output_*.py	New component files for grid, scalar, and CSV outputs
hydromt_wflow/utils.py	Renamed read_csv_results to read_csv_output function
tests/	Updated tests to use new output components instead of results
docs/	Updated documentation and examples to reference new component structure

Comments suppressed due to low confidence (1)

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[LuukBlom]

Very nice work! Code and tests look good, no comments at all!

Possibly, we could consider adding a sort of aggregated results component that uses the 3 components created in this pr to be more similar to the v0 implementation for users.

But to be honest, im not a big fan, I just want to have some conversation on this PR ;)

[Tjalling-dejong]

Good job on the new output components. The code is clear, neat, and well documented. I have only two minor comments.

[hboisgon]

Very nice work! Code and tests look good, no comments at all!

Possibly, we could consider adding a sort of aggregated results component that uses the 3 components created in this pr to be more similar to the v0 implementation for users.

But to be honest, im not a big fan, I just want to have some conversation on this PR ;)

Yes it's just in the end the way the components are build with the filename attribute and by splitting I can do more checks and processing if needed so I opted for that option. I think also nice for the user, the old dict containing everything was a little confusing I think.