refactor install guides to be under unsupported software

Author: bcumming

docs/build-install/applications/index.md

@@ -0,0 +1,5 @@
+[](){#ref-software-packages-matlab}
+# Matlab
+
+CSCS does not have a license to provide [Matlab](https://www.mathworks.com/products/matlab.html) to users on Alps.
+Users or groups with valid licenses can install Matlab themselves as [user software][ref-support-user-apps].

docs/build-install/applications/matlab.md

@@ -5,7 +5,7 @@ CSCS provides commonly used software and tools on Alps, however many use cases w
 
 <div class="grid cards" markdown>
 
-- :fontawesome-solid-earth-americas: __[Application guides][ref-build-applications]__ – guides on how to install commonly requested or difficult to install software.
+- :fontawesome-solid-earth-americas: __[Unsupported software][ref-software-installation-guides]__ – guides on how to install commonly requested or difficult to install software.
 
 </div>
 

docs/build-install/index.md

@@ -19,5 +19,4 @@ CSCS staff can also help users with performance analysis to optimise their workf
 CSCS provides [tools and environments][ref-building] for installing applications that are not on the list of supported applications.
 
 !!! info
-    We are building guides for installing [popular applications][ref-build-applications].
-
+    We are building guides for installing [popular applications][ref-software-installation-guides].

docs/software/sciapps/index.md

@@ -0,0 +1,29 @@
+[](){#ref-software-unsupported}
+# Unsupported Software
+
+This page documents frequently-requested applications that CSCS does not provide pre-built on Alps as [supported software][ref-support-apps].
+
+## Prohibited applications
+
+The use of the following applications probited from use on CSCS systems.
+
+| Software | Use | Reason Prohibited |
+| --- | --- | --- |
+| [Gaussian](https://gaussian.com/) | Electronic structure simulation | License terms probibit installation on CSCS systems |
+
+[](){#ref-software-installation-guides}
+## Installation guides
+
+This is a collection of installation guides for commonly-used software that is not on CSCS list of [officially supported software][ref-software-sciapps].
+
+* [Matlab][ref-software-packages-matlab]
+* [WRF][ref-software-packages-wrf]
+
+!!! note "Contributions welcome!"
+    The guides here are best effort, and may become out of date.
+
+    If you see that a guide is out of date, you are welcome to [propose an update](https://github.com/eth-cscs/cscs-docs/issues) or make a [contribution][ref-contributing].
+
+!!! danger "You are responsible for respecting license terms"
+    When installing software that require a license, it is the responsibility of users to ensure that the software is only available to them personally, or to [members of their group][ref-guides-storage-sharing] who are also permitted by the license to access the software.
+

docs/software/unsupported.md

@@ -75,9 +75,6 @@ nav:
       - 'uenv': build-install/uenv.md
       - 'Containers (podman)': build-install/containers.md
       - 'Python with pip': build-install/pip.md
-      - 'Applications':
-        - build-install/applications/index.md
-        - 'WRF': build-install/applications/wrf.md
     - 'Debugging and Performance Analysis':
       - software/devtools/index.md
       - 'Linaro uenv': software/devtools/linaro-uenv.md
@@ -96,7 +93,10 @@ nav:
       - 'Resource and hooks': software/container-engine/resource-hook.md
       - 'EDF reference': software/container-engine/edf.md
       - 'Known issues': software/container-engine/known-issue.md
-    - 'Unsupported Software': software/unsupported.md
+    - 'Unsupported Software':
+      - software/unsupported/index.md
+      - 'Matlab': build-install/applications/matlab.md
+      - 'WRF': build-install/applications/wrf.md
   - 'Services':
     - services/index.md
     - 'FirecREST': services/firecrest.md