chore: add tufte-inspired custom format

add github.com/fredguth/tufte-inspired as a custom format
# Conflicts:
#	docs/extensions/listings/custom-formats.yml

Author: fredguth

docs/extensions/listings/custom-formats.yml

@@ -108,3 +108,9 @@
   path: https://github.com/nmfs-opensci/quarto_titlepages
   author: '[nmfs-opensci](https://github.com/nmfs-opensc)'
   description: PDF format with custom title page or book cover.
+
+- name: Tufte-Inspired
+  path: https://github.com/fredguth/tufte-inspired
+  author: '[Fred Guth](https://github.com/fredguth/)'
+  description: |
+    Manuscript template inspired by the style of the books from Edward R. Tufte