add the diaquarto extension (#1435)

* add the diaquarto extension

Custom Format for the easy creation of slides using typst and the diatypst package. Similiar to beamer slides in quarto, but faster

* Update the broken link

* Update Link again

docs/extensions/listings/custom-formats.yml

@@ -21,6 +21,11 @@
   author: '[Kazuharu Yanagimoto](https://github.com/kazuyanagimoto)'
   description: A minimalistic presentation theme for Quarto + Typst by Touying
 
+- name: diaquarto
+  path: https://github.com/skriptum/diatypst/blob/main/diaquarto
+  author: "[marten](https://github.com/skriptum)"
+  description: easy slides via typst and the diatypst package - sensible defaults, easy syntax, well styled
+
 - name: fancy-doc
   path: https://github.com/DamonCharlesRoberts/fancy-doc
   author: '[DamonCharlesRoberts](https://github.com/DamonCharlesRoberts/)'