add quarto i18n extension

Author: ArthurData

docs/extensions/listings/revealjs.yml

@@ -65,6 +65,11 @@
   description: >
     Adds flashcards in slides that you can flip and shuffle.
 
+- name: i18n
+  path: https://github.com/ArthurData/quarto-i18n
+  author: '[ArthurData](https://github.com/ArthurData)'
+  description: Transform your Quarto slides into multilingual presentations effortlessly.
+
 - name: leader-line
   path: https://github.com/ofkoru/quarto-leader-line
   author: '[Omer Faruk Koru](https://github.com/ofkoru)'