first stab at mkdocs migration

refactor CSCS and Meg content

add merlin6 quick start

update merlin6 nomachine docs

give the userdoc its own color scheme

we use the Materials default one

refactored slurm general docs merlin6

add merlin6 JB docs

add software support m6 docs

add all files to nav

vibed changes #1

add missing pages

further vibing #2

vibe #3

further fixes

docs/merlin6/jupyterhub/jupyter-extensions.md

@@ -0,0 +1,30 @@
+# Jupyter Extensions
+
+## Using nbextensions for adding features to your notebook
+
+There exist a number of useful [contributed but unofficial
+extensions](https://jupyter-contrib-nbextensions.readthedocs.io/en/latest/index.html)
+that add useful features to your notebooks.
+
+From the classic Notebook UI you can access the available extensions in a
+separate tab as displayed in the screenshot, below. You may have to unselect
+the *disable configuration for nbextensions without explicit copatibility*. The
+extensions we tested still worked fine with this jupyterhub version of 1.0.0.
+
+![Launch Classic Notebook](../../images/jupyter/jupyter-launch-classic.png)
+/// caption
+///
+
+## Extensions for working with large notebooks
+
+Especially the following extensions make working with larger notebooks easier
+
+* **Table of Contents**: Displays a TOC on the left and you can also configure it
+  to add and update a TOC at the head of the document.
+* **Collapsible Headings**: allows you to fold all the cells below a heading
+
+It may also be interesting for you to explore the [Jupytext](jupytext.md) server extension.
+
+## Variable Inspector
+
+The `variable inspector` extension provides a constantly updated window in which you can see the value and type of your notebook's variables.