Add netcdf-tools uenv docs (#292)

There were no netcdf-tools docs.

Add them to go with the release of netcdf-tools/2025

https://docs.tds.cscs.ch/292/software/cw/netcdf-tools/

Author: bcumming

docs/software/cw/netcdf-tools.md

@@ -0,0 +1,90 @@
+[](){#ref-uenv-netcdf-tools}
+# netcdf-tools
+
+The `netcdf-tools` uenv provides a set of CLI tools and GUI tools frequently used in climate and weather workflows.
+
+The release schedule is not fixed, with new releases when required.
+
+| version            | node types        | system                                  | status |
+|--------------------|-------------------|-----------------------------------------|--------|
+| 2025               | zen2, gh200       | daint, eiger, santis, clariden          | :white_check_mark: |
+| 2024               | zen2, gh200       | daint, eiger, santis, clariden          | **DEPRECATED** |
+
+!!! warning
+    The `netcdf-tools/2024` version uses an old interface that won't load views correctly.
+
+    All users of version `2024` should upgrade to `2025` as soon as possible.
+
+
+The packages exposed via the `default` and `modules` views in `netcdf-tools/2025:v1` are:
+
+* [cdo@2.5.2](https://packages.spack.io/package.html?name=cdo)
+* [cray-mpich@8.1.32](https://packages.spack.io/package.html?name=cray-mpich)
+* [eccodes@2.41.0](https://packages.spack.io/package.html?name=eccodes)
+* [ferret@7.6.0](https://packages.spack.io/package.html?name=ferret)
+    * Only provided in Eiger because its build configuration hard-codes x86 instructions.
+* [gcc@14.3.0](https://packages.spack.io/package.html?name=gcc)
+* [gdal@3.11.0](https://packages.spack.io/package.html?name=gdal)
+* [geos@3.13.1](https://packages.spack.io/package.html?name=geos)
+* [hdf5@1.14.6](https://packages.spack.io/package.html?name=hdf5)
+* [nco@5.3.3](https://packages.spack.io/package.html?name=nco)
+* [ncview@2.1.9](https://packages.spack.io/package.html?name=ncview)
+* [netcdf-c@4.9.2](https://packages.spack.io/package.html?name=netcdf-c)
+* [netcdf-cxx4@4.3.1](https://packages.spack.io/package.html?name=netcdf-cxx4)
+* [netcdf-fortran@4.6.1](https://packages.spack.io/package.html?name=netcdf-fortran)
+* [python@3.13.5](https://packages.spack.io/package.html?name=python)
+* [udunits@2.2.28](https://packages.spack.io/package.html?name=udunits)
+
+## How to use
+
+Use the different views to access the software
+
+=== "the `netcdf` view"
+
+    The simplest way to get started is to use the `netcdf` file system view, which automatically loads all of the packages when the uenv is started.
+
+    !!! example "test mpi compilers and python provided by netcdf-tools/2025"
+        ```console
+        # start using the netcdf view
+        $ uenv start --view=netcdf netcdf-tools/2025:v1
+
+        # the software is available
+        $ which cdo
+        /user-environment/env/netcdf/bin/cdo
+        $ which gdal
+        /user-environment/env/netcdf/bin/gdal
+        $ gdal --version
+        GDAL 3.11.0 "Eganville", released 2025/05/06
+        ```
+
+    !!! example "run applications directly using uenv run"
+        ```console
+        # run ncview without having to start a uenv session
+        $ uenv run netcdf-tools/2025:v1 --view=netcdf -- ncview
+
+        # create an alias that launches tools in netcdf-tools (add it to bashrc)
+        $ alias ncx='uenv run --view=netcdf netcdf-tools/2025:v1 --'
+        # then run commands:
+        $ ncx ncview
+        $ ncx cdo
+        ```
+
+=== "modules"
+
+    The uenv provides modules for all of the software packages, which can be made available by using the `modules` view in 
+    No modules are loaded when a uenv starts, and have to be loaded individually using `module load`.
+
+    !!! example "starting netcdf-tools and using the provided modules"
+        ```console
+        $ uenv start netcdf-tools/2025:v1 --view=modules
+        $ module avail
+        ---------------------------- /user-environment/modules -----------------------------
+           cdo/2.5.2            gdal/3.11.0         ncview/2.1.9            squashfs/4.6.1
+           cray-mpich/8.1.32    geos/3.13.1         netcdf-c/4.9.2          udunits/2.2.28
+           eccodes/2.41.0       hdf5/1.14.6         netcdf-cxx4/4.3.1
+           ferret/7.6.0         libfabric/1.22.0    netcdf-fortran/4.6.1
+           gcc/14.3.0           nco/5.3.3           python/3.13.5
+        $ module load gdal
+        $ gdal --version
+        GDAL 3.11.0 "Eganville", released 2025/05/06
+        ```

mkdocs.yml

@@ -102,6 +102,7 @@ nav:
     - 'Climate and Weather':
       - software/cw/index.md
       - 'WRF': software/cw/wrf.md
+      - 'netcdf-tools': software/cw/netcdf-tools.md
     - 'Communication Libraries':
       - software/communication/index.md
       - 'Cray MPICH': software/communication/cray-mpich.md