first stab at mkdocs migration

docs/index.md

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+hide:
+  - navigation
+  - toc
+---
+
+# HPCE User Documentation
+
+![The HPCE clusters](images/front_page.png){ width="500" }
+/// caption
+The magical trio 🪄
+///
+
+The [HPCE
+group](https://www.psi.ch/en/awi/high-performance-computing-and-emerging-technologies-group)
+is part of the [PSI Center for Scientific Computing, Theory and
+Data](https://www.psi.ch/en/csd) at [Paul Scherrer
+Institute](https://www.psi.ch). It provides a range of HPC services for PSI
+scientists, such as the Merlin series of HPC clusters, and also engages in
+research activities on technologies (data analysis and machine learning
+technologies) used on these systems.
+
+## Quick Links
+
+- user support
+- news