Clean Merlin6 docs

mkdocs.yml

@@ -11,6 +11,10 @@ edit_uri: _edit/master/docs/
 # Copyright
 copyright: Copyright © 2025 HPC and Emerging Technologies Group/CSD @ Paul Scherrer Institut
 
+# CSS
+extra_css:
+  - css/custom-nav.css
+
 # Configuration
 theme:
   name: material
@@ -82,7 +86,7 @@ nav:
   - Home: index.md
   - News:
     - news/index.md
-  - Merlin 7:
+  - Merlin 7: 
     - Quick Start Guide:
       - merlin7/01-Quick-Start-Guide/introduction.md
       - merlin7/01-Quick-Start-Guide/code-of-conduct.md
@@ -126,11 +130,9 @@ nav:
     - Support:
       - merlin7/99-support/migration-from-merlin6.md
   - Merlin 6:
-    - merlin6/introduction.md
-    - merlin6/hardware-and-software-description.md
-    - merlin6/slurm-configuration.md
+    - Introduction:
+      - merlin6/introduction.md
     - Quick Start Guide:
-      - merlin6/quick-start-guide/introduction.md
       - merlin6/quick-start-guide/code-of-conduct.md
       - merlin6/quick-start-guide/requesting-accounts.md
       - merlin6/quick-start-guide/requesting-projects.md
@@ -143,7 +145,6 @@ nav:
       - merlin6/how-to-use-merlin/storage.md
       - merlin6/how-to-use-merlin/transfer-data.md
       - merlin6/how-to-use-merlin/archive.md
-      - merlin6/how-to-use-merlin/nomachine.md
       - merlin6/how-to-use-merlin/ssh-keys.md
       - merlin6/how-to-use-merlin/kerberos.md
       - merlin6/how-to-use-merlin/using-modules.md
@@ -157,10 +158,6 @@ nav:
       - gmerlin6/cluster-introduction.md
       - gmerlin6/hardware-and-software-description.md
       - gmerlin6/slurm-configuration.md
-    - Merlin 5 CPU Cluster:
-      - merlin5/cluster-introduction.md
-      - merlin5/hardware-and-software-description.md
-      - merlin5/slurm-configuration.md
     - Jupyterhub:
       - merlin6/jupyterhub/jupyterhub.md
       - merlin6/jupyterhub/jupyter-examples.md
@@ -181,11 +178,6 @@ nav:
       - merlin6/software-support/openmpi.md
       - merlin6/software-support/paraview.md
       - merlin6/software-support/python.md
-    - Announcements:
-      - merlin6/98-announcements/downtimes.md
-      - merlin6/98-announcements/past-downtimes.md
-    - Support:
-      - merlin6/99-support/migration-from-merlin5.md
   - MeG:
     - meg/index.md
     - meg/contact.md
@@ -198,3 +190,9 @@ nav:
     - support/faq.md
     - support/known-problems.md
     - support/troubleshooting.md
+
+markdown_extensions:
+  - pymdownx.superfences:
+      custom_fences:
+        - name: mermaid
+          class: mermaid