Add "aufsatz" template for academic reports

Author: sebastiansauer

docs/extensions/listings/custom-formats.yml

@@ -126,3 +126,10 @@
   author: '[Fred Guth](https://github.com/fredguth/)'
   description: |
     Manuscript template inspired by the style of the books from Edward R. Tufte
+
+
+- name: aufsatz
+  path: https://github.com/sebastiansauer/quarto-typst-academic-template
+  author: '[sebastiansauer](https://github.com/sebastiansauer)'
+  description: |
+    Quarto template for academic reports via Typst